c assignment in loop

Example of Augmented Arithmetic and Assignment Operators

There can be five combinations of bitwise operators with the assignment operator, "=". Let's look at them one by one.

Example of Augmented Bitwise and Assignment Operators

Practice problems on assignment operators in c, 1. what will the value of "x" be after the execution of the following code.

The correct answer is 52. x starts at 50, increases by 5 to 55, then decreases by 3 to 52.

2. After executing the following code, what is the value of the number variable?

The correct answer is 144. After right-shifting 73 (binary 1001001) by one and then left-shifting the result by two, the value becomes 144 (binary 10010000).

Benefits of Using Assignment Operators

• Simplifies Code: For example, x += 1 is shorter and clearer than x = x + 1.
• Reduces Errors: They break complex expressions into simpler, more manageable parts thus reducing errors.
• Improves Readability: They make the code easier to read and understand by succinctly expressing common operations.
• Enhances Performance: They often operate in place, potentially reducing the need for additional memory or temporary variables.

Best Practices and Tips for Using the Assignment Operator

While performing arithmetic operations with the same variable, use compound assignment operators

• Initialize Variables When Declaring int count = 0 ; // Initialization
• Avoid Complex Expressions in Assignments a = (b + c) * (d - e); // Consider breaking it down: int temp = b + c; a = temp * (d - e);
• Avoid Multiple Assignments in a Single Statement // Instead of this a = b = c = 0 ; // Do this a = 0 ; b = 0 ; c = 0 ;
• Consistent Formatting int result = 0 ; result += 10 ;

When mixing assignments with other operations, use parentheses to ensure the correct order of evaluation.

Live Classes Schedule

Can't find convenient schedule? Let us know

About Author

• 22+ Video Courses
• 800+ Hands-On Labs
• 400+ Quick Notes
• 55+ Skill Tests
• 45+ Interview Q&A Courses
• 10+ Real-world Projects
• Career Coaching Sessions
• Email Support

We use cookies to make interactions with our websites and services easy and meaningful. Please read our Privacy Policy for more details.

Loop programming exercises and solutions in C

In programming, there exists situations when you need to repeat single or a group of statements till some condition is met. Such as – read all files of a directory, send mail to all employees one after another etc. These task in C programming is handled by looping statements .

Looping statement defines a set of repetitive statements. These statements are repeated with same or different parameters for a number of times. Looping statement is also known as iterative or repetitive statement .

C supports three looping statements.

• do…while loop

In this exercise we will practice lots of looping problems to get a strong grip on loop. This is most recommended C programming exercise for beginners.

Always feel free to drop your queries, suggestions, hugs or bugs down below in the comments section . I always look forward to hear from you.

Required knowledge

Basic C programming , Relational operators , Logical operators , If else , For loop

List of loop programming exercises

• Write a C program to print all natural numbers from 1 to n.  – using  while loop
• Write a C program to print all natural numbers in reverse (from n to 1) . – using  while loop
• Write a C program to print all alphabets from a to z.  – using  while loop
• Write a C program to print all even numbers between 1 to 100.  – using  while loop
• Write a C program to print all odd number between 1 to 100.
• Write a C program to find sum of all natural numbers between 1 to n.
• Write a C program to find sum of all even numbers between 1 to n .
• Write a C program to find sum of all odd numbers between 1 to n .
• Write a C program to print multiplication table of any number .
• Write a C program to count number of digits in a number .
• Write a C program to find first and last digit of a number .
• Write a C program to find sum of first and last digit of a number.
• Write a C program to swap first and last digits of a number .
• Write a C program to calculate sum of digits of a number .
• Write a C program to calculate product of digits of a number .
• Write a C program to enter a number and print its reverse .
• Write a C program to check whether a number is palindrome or not.
• Write a C program to find frequency of each digit in a given integer .
• Write a C program to enter a number and print it in words.
• Write a C program to print all ASCII character with their values .
• Write a C program to find power of a number using for loop .
• Write a C program to find all factors of a number .
• Write a C program to calculate factorial of a number .
• Write a C program to find HCF (GCD) of two numbers .
• Write a C program to find LCM of two numbers .
• Write a C program to check whether a number is Prime number or not.
• Write a C program to print all Prime numbers between 1 to n.
• Write a C program to find sum of all prime numbers between 1 to n .
• Write a C program to find all prime factors of a number .
• Write a C program to check whether a number is Armstrong number or not.
• Write a C program to print all Armstrong numbers between 1 to n.
• Write a C program to check whether a number is Perfect number or not .
• Write a C program to print all Perfect numbers between 1 to n .
• Write a C program to check whether a number is Strong number or not .
• Write a C program to print all Strong numbers between 1 to n .
• Write a C program to print Fibonacci series up to n terms .
• Write a C program to find one’s complement of a binary number .
• Write a C program to find two’s complement of a binary number .
• Write a C program to convert Binary to Octal number system .
• Write a C program to convert Binary to Decimal number system .
• Write a C program to convert Binary to Hexadecimal number system .
• Write a C program to convert Octal to Binary number system .
• Write a C program to convert Octal to Decimal number system .
• Write a C program to convert Octal to Hexadecimal number system .
• Write a C program to convert Decimal to Binary number system .
• Write a C program to convert Decimal to Octal number system .
• Write a C program to convert Decimal to Hexadecimal number system .
• Write a C program to convert Hexadecimal to Binary number system .
• Write a C program to convert Hexadecimal to Octal number system .
• Write a C program to convert Hexadecimal to Decimal number system .
• Write a C program to print Pascal triangle upto n rows .
• Star pattern programs – Write a C program to print the given star patterns.
• Number pattern programs – Write a C program to print the given number patterns .

• Overview of C
• Features of C
• Install C Compiler/IDE
• My First C program
• Compile and Run C program
• Understand Compilation Process
• C Syntax Rules
• Keywords and Identifier
• Understanding Datatypes
• Using Datatypes (Examples)
• What are Variables?
• What are Literals?
• Constant value Variables - const
• C Input / Output
• Operators in C Language
• Decision Making
• Switch Statement
• String and Character array
• Storage classes

C Functions

• Introduction to Functions
• Types of Functions and Recursion
• Types of Function calls
• Passing Array to function

C Structures

• All about Structures
• Pointers concept
• Declaring and initializing pointer
• Pointer to Pointer
• Pointer to Array
• Pointer to Structure
• Pointer Arithmetic
• Pointer with Functions

C File/Error

• File Input / Output
• Error Handling
• Dynamic memory allocation
• Command line argument
• 100+ C Programs with explanation and output

During programming, sometimes we might need to execute a certain code statement again and again . We can write the code statement as many times as we need it to execute but that would be very inefficient, because what if you want a code statement to execute a 100 times? This is why we use loops.

In any programming language including C language, loops are used to execute a single statement or a set of statements, repeatedly, until a particular condition is satisfied.

How Loops in C works?

The below diagram depicts a loop execution,

As per the above diagram, if the Test Condition is true , then the loop is executed, and if it is false then the execution breaks out of the loop. After the loop is successfully executed the execution again starts from the Loop entry and again checks for the Test condition, and this keeps on repeating.

The sequence of statements to be executed is kept inside the curly braces { } known as the Loop body . After every execution of the loop body, condition is verified, and if it is found to be true the loop body is executed again. When the condition check returns false , the loop body is not executed, and execution breaks out of the loop.

Loops are broadly classified into two types:

1. Entry controlled loops

In this kind of loop, the condition is checked before executing the loop's body. So, if the condition is never true, it won't execute even once. For example, for and while loop.

2. Exit controlled loops

In this kind of loop, the condition is checked after the loop's body is executed, i.e., in the end. Hence, even if the condition is not fulfilled, this loop will execute one time. The do-while loop is an example of exit controlled loop.

Types of Loop in C

There are 3 types of Loop in C language, namely:

• do while loop

1. while loop in C

The while loop is an entry controlled loop. It is completed in 3 steps.

• Variable initialization.(e.g int x = 0; )
• condition(e.g while(x )
• Variable increment or decrement ( x++ or x-- or x = x + 2 )

Syntax of while Loop:

The following flowchart shows the flow of execution when we use a while loop.

Here, we can see that firstly, we initialize our iterator. Then we check the condition of while loop. If it is false , we exit the loop and if it is true , we enter the loop. After entering the loop, we execute the statements inside the while loop, update the iterator and then again check the condition. We do the same thing unless the condition is false .

Program to print your name n times using while loop

In this program we will use the while looop to print a word a given number of time.

Enter the number of times you want to print your name:3 Enter your name:studytonight studytonight studytonight studytonight

Run Code →

Let's dry run of the above code:

Firstly, we input n = 3 , then name = studytonight? .

Now, we reach the while loop so we check the condition; n = 3, which is nonzero, so we enter the loop. We execute the printf() statement and print name on the console and then decrement n , so now n = 2. We again check the condition; n = 2, which is nonzero, so we enter the loop and print name and decrement n . Now n = 1. We check the condition again; n is 1 which is nonzero so we again enter the loop and execute the statements. Now we have n = 0 . We check the condition; n is zero now so we don't enter the loop. We exit the loop and start executing the statements after it.

Let's see another example.

Program to print first 10 natural numbers using while loop

1 2 3 4 5 6 7 8 9 10

2. for loop in C

The for loop in C is used to execute a set of statements repeatedly until a particular condition is satisfied. We can say it is an open ended loop . General format is,

In the for loop in C language, we have exactly two mandatory semicolons, one after initialization and second after the condition . In this loop we can have more than one initialization or increment/decrement as well, separated using comma operator. But it can have only one condition .

The for loop is executed as follows:

• It first evaluates the initialization code.
• Then it checks the condition expression.
• If it is true , it executes the for-loop body.
• Then it evaluate the increment/decrement condition and again follows from step 2.
• When the condition expression becomes false , it exits the loop.

Following is a flowchart explaining how the for loop executes.

We first initialize our iterator. Then we check the condition of the loop. If it is false , we exit the loop and if it is true , we enter the loop. After entering the loop, we execute the statements inside the for loop, update the iterator and then again check the condition. We do the same thing unless the test condition returns false .

Program to print your name n times using for loop

Enter the number of times you want to print your name:4 Enter your name:studytonight studytonight studytonight

Firstly, we input n = 3, then name = studytonight.

Now, we reach the for loop so we initialize i with 1. We check the condition; 1 <= 3, so we enter the loop. We execute the printf() statement and print name on the console. We again reach the for loop. We increment i by 1; so now i = 2. We again check the condition; 2 <= 3, so we enter the loop and print name. Now i is incremented again to 3. We check the condition again; 3 <= 3, so we enter the loop and execute the statements. Now we have i = 4. We check the condition; 4 > 3, so we don't enter the loop. We exit the loop and start executing the statements after it.

Program to print first 10 natural numbers using for loop

3. Nested for loop in C

We can also have nested for loops, i.e one for loop inside another for loop in C language. This type of loop is generally used while working with multi-dimensional arrays. To learn more about arrays and how for loops are used in arrays, check out our tutorial on arrays in C . Basic syntax for nested for loop is,

Program to print half Pyramid of numbers using Nested loops

1 21 321 4321 54321

4. do while loop in C

In some situations it is necessary to execute body of the loop once before testing the condition. Such situations can be handled with the help of do-while loop. The do statement evaluates the body of the loop first and at the end, the condition is checked using while statement. It means that the body of the loop will be executed at least once, even though the starting condition inside while is initialized to be false . General syntax is,

Remember that the semicolon at the end of do-while loop is mandatory. It denotes end of the loop.

Following is the flowchart for do-while loop:

We initialize our iterator. Then we enter body of the do-while loop. We execute the statement and then reach the end. At the end, we check the condition of the loop. If it is false , we exit the loop and if it is true , we enter the loop. We keep repeating the same thing unless the condition turns false .

Program to print your name N times using do-while loop

Enter the number of times you want to print your name: 10 Enter your name: studytonight studytonight

Dry run of the above code:

Firstly, we input n = 10, then name = studytonight.

Now, we enter the do-while loop because we check the condition only at the end. When we reach the end, we check the condition; n = 10, which is greater than zero, so we exit the loop and start executing the statements after it. Here we can see that even if the condition was always false , the loop got executed once.

Program to print first 10 multiples of 5 using do-while loop

5 10 15 20 25 30 35 40 45 50

Infinite Loops in C

We come across infinite loops in our code when the compiler does not know where to stop. It does not have an exit. This means that either there is no condition to be checked or the condition is incorrect. This is why an iterator is very important in our loops. And a proper condition that ends.

Let's see a few examples of infinite loops in C:

The above code has no condition in place, hence it will keep on executing.

In the code above, we are not changing the value on i , hence the condition in the while loop will never fail.

Another example, with a constant value as condition, which is always true hence the code will keep on executing.

Jumping Out of Loops in C

Sometimes, while executing a loop, it becomes necessary to skip a part of the loop or to leave the loop as soon as certain condition becomes true . This is known as jumping out of loop.

1. break statement in C

When break statement is encountered inside a loop, the loop is immediately exited and the program continues to execute with the statements after the loop.

Let's see a code example,

Enter the number of times you want to print your name:7 Enter your name:studytonight studytonight studytonight studytonight studytonight

In the above code, as soon as we find an index which is divisible by 5 , the loop breaks and control is shifted out of the loop.

2. continue statement in C

It causes the control to go directly to the test-condition and then continue the loop execution. On encountering continue , the execution leaves the current cycle of loop, and starts with the next cycle.

Enter the number of times you want to print your name:5 Enter your name:studytonight 1 : studytonight 3 : studytonight 5 : studytonight

In the above example, whenever we come across an even index, we move on to the next index because of the continue statement.

In this tutorial, we have learned about for , while and do-while loops in C and why they are important, along with seeing them in action with multiple code examples. We also learnt about break and continue statements.

• ← Prev
• Next →

Learn C practically and Get Certified .

Popular Tutorials

Popular examples, reference materials, learn c interactively, c introduction.

• Getting Started with C
• Your First C Program

C Fundamentals

• C Variables, Constants and Literals
• C Data Types
• C Input Output (I/O)
• C Programming Operators

C Flow Control

C if...else Statement

C while and do...while Loop

• C break and continue

C switch Statement

• C goto Statement
• C Functions
• C User-defined functions
• Types of User-defined Functions in C Programming
• C Recursion
• C Storage Class

C Programming Arrays

• C Multidimensional Arrays
• Pass arrays to a function in C

C Programming Pointers

• Relationship Between Arrays and Pointers
• C Pass Addresses and Pointers
• C Dynamic Memory Allocation
• C Array and Pointer Examples
• C Programming Strings
• String Manipulations In C Programming Using Library Functions
• String Examples in C Programming

C Structure and Union

• C structs and Pointers
• C Structure and Function

C Programming Files

• C File Handling
• C Files Examples

C Additional Topics

• C Keywords and Identifiers
• C Precedence And Associativity Of Operators
• C Bitwise Operators
• C Preprocessor and Macros
• C Standard Library Functions

C Tutorials

• Count Number of Digits in an Integer
• Find LCM of two Numbers
• Calculate the Sum of Natural Numbers

In programming, a loop is used to repeat a block of code until the specified condition is met.

C programming has three types of loops:

• do...while loop

We will learn about for loop in this tutorial. In the next tutorial, we will learn about while and do...while loop.

The syntax of the for loop is:

• How for loop works?
• The initialization statement is executed only once.
• Then, the test expression is evaluated. If the test expression is evaluated to false, the for loop is terminated.
• However, if the test expression is evaluated to true, statements inside the body of the for loop are executed, and the update expression is updated.
• Again the test expression is evaluated.

This process goes on until the test expression is false. When the test expression is false, the loop terminates.

To learn more about test expression (when the test expression is evaluated to true and false), check out relational and logical operators .

for loop Flowchart

Example 1: for loop

• i is initialized to 1.
• The test expression i < 11 is evaluated. Since 1 less than 11 is true, the body of for loop is executed. This will print the 1 (value of i ) on the screen.
• The update statement ++i is executed. Now, the value of i will be 2. Again, the test expression is evaluated to true, and the body of for loop is executed. This will print 2 (value of i ) on the screen.
• Again, the update statement ++i is executed and the test expression i < 11 is evaluated. This process goes on until i becomes 11.
• When i becomes 11, i < 11 will be false, and the for loop terminates.

Example 2: for loop

The value entered by the user is stored in the variable num . Suppose, the user entered 10.

The count is initialized to 1 and the test expression is evaluated. Since the test expression count<=num (1 less than or equal to 10) is true, the body of for loop is executed and the value of sum will equal to 1.

Then, the update statement ++count is executed and count will equal to 2. Again, the test expression is evaluated. Since 2 is also less than 10, the test expression is evaluated to true and the body of the for loop is executed. Now, sum will equal 3.

This process goes on and the sum is calculated until the count reaches 11.

When the count is 11, the test expression is evaluated to 0 (false), and the loop terminates.

Then, the value of sum is printed on the screen.

We will learn about while loop and do...while loop in the next tutorial.

Table of Contents

• for Loop Examples

Video: C for Loop

Sorry about that.

Related Tutorials

C Ternary Operator

• C Programming Tutorial
• Basics of C
• C - Overview
• C - Features
• C - History
• C - Environment Setup
• C - Program Structure
• C - Hello World
• C - Compilation Process
• C - Comments
• C - Keywords
• C - Identifiers
• C - User Input
• C - Basic Syntax
• C - Data Types
• C - Variables
• C - Integer Promotions
• C - Type Conversion
• C - Type Casting
• C - Booleans
• Constants and Literals in C
• C - Constants
• C - Literals
• C - Escape sequences
• C - Format Specifiers
• Operators in C
• C - Operators
• C - Arithmetic Operators
• C - Relational Operators
• C - Logical Operators
• C - Bitwise Operators
• C - Assignment Operators
• C - Unary Operators
• C - Increment and Decrement Operators
• C - Ternary Operator
• C - sizeof Operator
• C - Operator Precedence
• C - Misc Operators
• Decision Making in C
• C - Decision Making
• C - if statement
• C - if...else statement
• C - nested if statements
• C - switch statement
• C - nested switch statements
• C - While loop
• C - For loop
• C - Do...while loop
• C - Nested loop
• C - Infinite loop
• C - Break Statement
• C - Continue Statement
• C - goto Statement
• Functions in C
• C - Functions
• C - Main Functions
• C - Function call by Value
• C - Function call by reference
• C - Nested Functions
• C - Variadic Functions
• C - User-Defined Functions
• C - Callback Function
• C - Return Statement
• C - Recursion
• Scope Rules in C
• C - Scope Rules
• C - Static Variables
• C - Global Variables
• Arrays in C
• C - Properties of Array
• C - Multi-Dimensional Arrays
• C - Passing Arrays to Function
• C - Return Array from Function
• C - Variable Length Arrays
• Pointers in C
• C - Pointers
• C - Pointers and Arrays
• C - Applications of Pointers
• C - Pointer Arithmetics
• C - Array of Pointers
• C - Pointer to Pointer
• C - Passing Pointers to Functions
• C - Return Pointer from Functions
• C - Function Pointers
• C - Pointer to an Array
• C - Pointers to Structures
• C - Chain of Pointers
• C - Pointer vs Array
• C - Character Pointers and Functions
• C - NULL Pointer
• C - void Pointer
• C - Dangling Pointers
• C - Dereference Pointer
• C - Near, Far and Huge Pointers
• C - Initialization of Pointer Arrays
• C - Pointers vs. Multi-dimensional Arrays
• Strings in C
• C - Strings
• C - Array of Strings
• C - Special Characters
• C Structures and Unions
• C - Structures
• C - Structures and Functions
• C - Arrays of Structures
• C - Self-Referential Structures
• C - Lookup Tables
• C - Dot (.) Operator
• C - Enumeration (or enum)
• C - Structure Padding and Packing
• C - Nested Structures
• C - Anonymous Structure and Union
• C - Bit Fields
• C - Typedef
• File Handling in C
• C - Input & Output
• C - File I/O (File Handling)
• C Preprocessors
• C - Preprocessors
• C - Pragmas
• C - Preprocessor Operators
• C - Header Files
• Memory Management in C
• C - Memory Management
• C - Memory Address
• C - Storage Classes
• Miscellaneous Topics
• C - Error Handling
• C - Variable Arguments
• C - Command Execution
• C - Math Functions
• C - Static Keyword
• C - Random Number Generation
• C - Command Line Arguments
• C Programming Resources
• C - Questions & Answers
• C - Quick Guide
• C - Useful Resources
• C - Discussion
• Selected Reading
• UPSC IAS Exams Notes
• Developer's Best Practices
• Questions and Answers
• Effective Resume Writing
• HR Interview Questions
• Computer Glossary

C - While Loop

In C, while is one of the keywords with which we can form loops. The while loop is one of the most frequently used types of loops in C . The other looping keywords in C are for and do-while .

The while loop is often called the entry verified loop , whereas the do-while loop is an exit verified loop . The for loop , on the other hand, is an automatic loop .

Syntax of C while Loop

The syntax of constructing a while loop is as follows −

The while keyword is followed by a parenthesis, in which there should be a Boolean expression. Followed by the parenthesis, there is a block of statements inside the curly brackets.

Flowchart of C while Loop

The following flowchart represents how the while loop works −

How while Loop Works in C?

The C compiler evaluates the expression. If the expression is true, the code block that follows, will be executed. If the expression is false, the compiler ignores the block next to the while keyword, and proceeds to the immediately next statement after the block.

Since the expression that controls the loop is tested before the program enters the loop, the while loop is called the entry verified loop . Here, the key point to note is that a while loop might not execute at all if the condition is found to be not true at the very first instance itself.

The while keyword implies that the compiler continues to execute the ensuing block as long as the expression is true. The condition sits at the top of the looping construct. After each iteration, the condition is tested. If found to be true, the compiler performs the next iteration. As soon as the expression is found to be false, the loop body will be skipped and the first statement after the while loop will be executed.

Let us try to understand the behaviour of while loop with a few examples.

Example of while Loop in C

The following program prints the "Hello World" message five times.

Here, the while loop acts as a counted loop. Run the code and check its output −

Example Explanation

The variable "a" that controls the number of repetitions is initialized to 1, before the while statement. Since the condition "a <= 5" is true, the program enters the loop, prints the message, increments "a" by 1, and goes back to the top of the loop.

In the next iteration, "a" is 2, hence the condition is still true, hence the loop repeats again, and continues till the condition turns false. The loop stops repeating, and the program control goes to the step after the block.

Now, change the initial value of "a" to 10 and run the code again. Now the output will show the following −

This is because the condition before the while keyword is false in the very first iteration itself, hence the block is not repeated.

A "char" variable represents a character corresponding to its ASCII value. Hence, it can be incremented. Hence, we increment the value of the variable from "a" till it reaches "z".

Using while as Conditional Loop

You can use a while loop as a conditional loop where the loop will be executed till the given condition is satisfied.

In this example, the while loop is used as a conditional loop . The loop continues to repeat till the input received is non-negative.

Run the code and check its output −

While Loop with break and continue

In all the examples above, the while loop is designed to repeat for a number of times, or till a certain condition is found. C has break and continue statements to control the loop. These keywords can be used inside the while loop.

The break statement causes a loop to terminate −

The continue statement makes a loop repeat from the beginning −

More Examples of C while Loop

Example: printing lowercase alphabets.

The following program prints all the lowercase alphabets with the help of a while loop.

Example: Equate Two Variables

In the code given below, we have two variables "a" and "b" initialized to 10 and 0, respectively. Inside the loop, "b" is decremented and "a" is incremented on each iteration. The loop is designed to repeat till "a" and "b" are not equal. The loop ends when both reach 5.

When you run this code, it will produce the following output −

while Vs. do while Loops

The do-while loop appears similar to the while loop in most cases, although there is a difference in its syntax. The do-while is called the exit verified loop . In some cases, their behaviour is different. Difference between while and do-while loop is explained in the do-while chapter of this tutorial.

cppreference.com

Conditionally executes a statement repeatedly.

[ edit ] Syntax

[ edit ] Condition

A condition can either be an expression or a simple declaration . If it can be syntactically resolved as either an expression or a declaration, it is interpreted as the latter.

When control reaches condition , the condition will yield a value of type bool , which is used to determine whether statement will be executed.

[ edit ] Expression

If condition is an expression, the value it yields is the the value of the expression contextually converted to bool . If that conversion is ill-formed, the program is ill-formed.

[ edit ] Declaration

If condition is not an expression, it is a simple declaration with the following restrictions:

• It has only one declarator .
• The declarator cannot specify a function or an array .
• The declarator must have an initializer , which cannot be of syntax (3) .
• The declaration specifier sequence can only contain type specifiers and constexpr (since C++11) , and it cannot define a class or enumeration .

In this case, the value which condition yields is the value of the declared variable contextually converted to bool . If that conversion is ill-formed, the program is ill-formed.

[ edit ] Explanation

A while statement is equivalent to

If condition is a declaration, the variable it declares is destroyed and created with each iteration of the loop.

If the loop needs to be terminated within statement , a break statement can be used as terminating statement.

If the current iteration needs to be terminated within statement , a continue statement can be used as shortcut.

[ edit ] Notes

Regardless of whether statement is a compound statement, it always introduces a block scope . Variables declared in it are only visible in the loop body, in other words,

is the same as

As part of the C++ forward progress guarantee , the behavior is undefined if a loop that is not a trivial infinite loop (since C++26) without observable behavior does not terminate. Compilers are permitted to remove such loops.

[ edit ] Keywords

[ edit ] example, [ edit ] see also.

• Recent changes
• Offline version
• What links here
• Related changes
• Upload file
• Special pages
• Printable version
• Permanent link
• Page information
• In other languages
• This page was last modified on 18 June 2024, at 23:28.
• Privacy policy
• About cppreference.com
• Disclaimers

In order to continue enjoying our site, we ask that you confirm your identity as a human. Thank you very much for your cooperation.

• Advanced Search

Misconceptions about Loops in C

New citation alert added.

This alert has been successfully added and will be sent to:

You will be notified whenever a record that you have chosen has been cited.

To manage your alert preferences, click on the button below.

New Citation Alert!

Please log in to your account

Information & Contributors

Bibliometrics & citations, view options, index terms.

Software and its engineering

Software organization and properties

Software functional properties

Formal methods

Automated static analysis

Software verification

Recommendations

Clapp: characterizing loops in android applications (invited talk).

When performing program analysis, loops are one of the most important aspects that needs to be taken into account. In the past, many approaches have been proposed to analyze loops to perform different tasks, ranging from compiler optimizations to Worst-...

CLAPP: characterizing loops in Android applications

Program analysis too loopy set the loops aside.

Among the many obstacles to efficient and sound program analysis, loops may be the most prevalent. In program analyses that traverse paths, loops introduce a variable, possibly infinite and number of paths. This study assesses the potential of a program ...

Information

Published in.

• General Chairs:

Inria, France / University of Lille, France

University of California at Davis, USA

• SIGPLAN: ACM Special Interest Group on Programming Languages

Association for Computing Machinery

New York, NY, United States

Publication History

Permissions, check for updates.

Author Tags

• Loop Analysis
• Software Verification
• Static Analysis
• Research-article

Acceptance Rates

Contributors, other metrics, bibliometrics, article metrics.

• 0 Total Citations
• 16 Total Downloads
• Downloads (Last 12 months) 16
• Downloads (Last 6 weeks) 16

View options

View or Download as a PDF file.

View online with eReader .

Login options

Check if you have access through your login credentials or your institution to get full access on this article.

Full Access

Share this publication link.

Copying failed.

Share on social media

Affiliations, export citations.

• Please download or close your previous search result export first before starting a new bulk export. Preview is not available. By clicking download, a status dialog will open to start the export process. The process may take a few minutes but once it finishes a file will be downloadable from your browser. You may continue to browse the DL while the export process is in progress. Download
• Download citation
• Copy citation

We are preparing your search results for download ...

We will inform you here when the file is ready.

Your file of search results citations is now ready.

Your search export query has expired. Please try again.

Head on collision and car fire cause scene on Masonboro Loop Road

WILMINGTON, N.C. (WECT) - The Wilmington Fire Department responded to Masonboro Loop Road near Masonboro Elementary at around 2:37 p.m. on Friday, June 28.

Per the WFD, there was a head on collision and two people were taken to the hospital with minor injuries.

Nobody was in the car that caught fire when the flames began.

The fire marshal is investigating.

Copyright 2024 WECT. All rights reserved.

Wilmington Police Department announces end of SABLE helicopter use

All but one N.C. county currently affected by drought

Final report released for 2023 Colonial Beach plane crash involving two Wilmington residents

Most snake bites ever in NC in first six months, poison control says

President Joe Biden and first lady land at RDU early Friday, holding rally at NC State Fairgrounds in Raleigh

Latest news.

Two lanes reopen on I-40 due to crash near Burgaw

NC 4th of July Festival traffic

Lane reopened on US-421 near USS North Carolina Road after crash

14.5 miles of roads in Brunswick Co. to be improved

• Loop app overview
• Start with Loop on mobile
• FAQ: Loop mobile
• Get Loop with M365 subscriptions
• Loop app preview limits
• Keyboard shortcuts
• Loop components in OneNote
• Loop components in Outlook
• Loop components in Word
• Loop components in Whiteboard
• Loop task sync
• Accessibility: Keyboarding in Loop
• Accessibility: Screen reader in Loop
• Use Jira with Loop
• Use Trello with Loop
• Use Planner with Loop
• Use GitHub with Loop
• Start with Copilot in Loop
• FAQ: Copilot in Loop
• Use Copilot with Loop page content
• Use Copilot to recap changes in Loop

Microsoft Loop storage limits

Microsoft Loop  is currently available at no cost for personal Microsoft Accounts, Microsoft 365 subscribers and users with a Microsoft work/school account.

As of 25 June 2024, Loop workspaces and pages will now count towards an individual's Microsoft storage quota. Loop workspaces no longer have a 5GB maximum size.

Caution:  If you exceed your storage quota, you may not be able to send or receive email. Learn more .

Frequently asked questions

How can i reduce workspace size to keep within the limit .

You can reduce the size of your Loop workspace by deleting unneeded pages and/or deleting unneeded page-version history. 

Note:  Deletion of pages and version history will only be supported on web during Loop app Public Preview.

To delete pages you no longer need:

In the sidebar, open the “ … ” menu. 

Choose Delete  

To delete unneeded versions of pages from history:   

Open the “ … ” menu in the top-right corner of the page.

Choose Version History .

Delete unneeded versions from the list. 

What if deleting page content doesn’t seem to reduce size? 

You may exceed limitations because of certain sizeable content within a specific page, but deleting content from that page does not reduce overall workspace size. Fortunately, it is possible to remove page elements to reduce size while keeping the rest of the page intact. Take these steps:  

Create a new Loop page.

Copy and paste all content from the existing “oversize” Loop page into the new page.

Delete the excessive content from this new Loop page – which is your newly trimmed-down replacing page.

Completely delete the old, oversized Loop page. 

If you are close to your reaching your storage limit there may be insufficient available storage capacity to copy and paste a large page's content into a new page. 

Your Loop workspaces and components contribute to your Microsoft cloud storage, and if you exceed your storage quota, you may not be able to send or receive email. Learn more .

How can I create a new Loop workspace once I reach the maximum number allowed? 

Once you reach your maximum number of Loop workspaces, you can make space for a new one by deleting any other existing workspace that you have personally created: 

Identify an existing workspace (that you personally created) that you want to delete.

Copy and paste the contents of any pages you want to keep from that workspace into a different workspace (i.e., into one that you’re not going to delete). 

On the workspace to be deleted, open the “ … ” menu on the Loop Home screen, then choose Delete .

Once the workspace is deleted, you now have space to create a new one.

 How can I add more members to my Loop workspace once I reach the maximum? 

Once you reach the maximum number of allowed users in a Loop workspace, you will need to remove existing members from the workspace to make space for adding others:

Open the workspace.

Select the Members button under the name of the workspace in the sidebar. 

Select the " X " button on the persons to be removed (presumably those who no longer need access).

You can now add more users per the number of users that have been deleted. 

Using Loop with Microsoft 365 subscriptions

Get started with Microsoft Loop

Microsoft Answers community for Microsoft Loop

Need more help?

Want more options.

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Microsoft 365 subscription benefits

Microsoft 365 training

Microsoft security

Accessibility center

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Ask the Microsoft Community

Microsoft Tech Community

Windows Insiders

Microsoft 365 Insiders

Was this information helpful?

Thank you for your feedback.

• C Data Types
• C Operators
• C Input and Output
• C Control Flow
• C Functions
• C Preprocessors
• C File Handling
• C Cheatsheet
• C Interview Questions

C Exercises – Practice Questions with Solutions for C Programming

The best way to learn C programming language is by hands-on practice. This C Exercise page contains the top 30 C exercise questions with solutions that are designed for both beginners and advanced programmers. It covers all major concepts like arrays, pointers, for-loop, and many more.

So, Keep it Up! Solve topic-wise C exercise questions to strengthen your weak topics.

C Programming Exercises

The following are the top 30 programming exercises with solutions to help you practice online and improve your coding efficiency in the C language. You can solve these questions online in GeeksforGeeks IDE.

Q1: Write a Program to Print “Hello World!” on the Console.

In this problem, you have to write a simple program that prints “Hello World!” on the console screen.

For Example,

Click here to view the solution.

Q2: write a program to find the sum of two numbers entered by the user..

In this problem, you have to write a program that adds two numbers and prints their sum on the console screen.

Q3: Write a Program to find the size of int, float, double, and char.

In this problem, you have to write a program to print the size of the variable.

Q4: Write a Program to Swap the values of two variables.

In this problem, you have to write a program that swaps the values of two variables that are entered by the user.

Swap two numbers

Q5: Write a Program to calculate Compound Interest.

In this problem, you have to write a program that takes principal, time, and rate as user input and calculates the compound interest.

Q6: Write a Program to check if the given number is Even or Odd.

In this problem, you have to write a program to check whether the given number is even or odd.

Q7: Write a Program to find the largest number among three numbers.

In this problem, you have to write a program to take three numbers from the user as input and print the largest number among them.

Q8: Write a Program to make a simple calculator.

In this problem, you have to write a program to make a simple calculator that accepts two operands and an operator to perform the calculation and prints the result.

Q9: Write a Program to find the factorial of a given number.

In this problem, you have to write a program to calculate the factorial (product of all the natural numbers less than or equal to the given number n) of a number entered by the user.

Q10: Write a Program to Convert Binary to Decimal.

In this problem, you have to write a program to convert the given binary number entered by the user into an equivalent decimal number.

Q11: Write a Program to print the Fibonacci series using recursion.

In this problem, you have to write a program to print the Fibonacci series(the sequence where each number is the sum of the previous two numbers of the sequence) till the number entered by the user using recursion.

Fibonacci Series

Q12: Write a Program to Calculate the Sum of Natural Numbers using recursion.

In this problem, you have to write a program to calculate the sum of natural numbers up to a given number n.

Q13: Write a Program to find the maximum and minimum of an Array.

In this problem, you have to write a program to find the maximum and the minimum element of the array of size N given by the user.

Q14: Write a Program to Reverse an Array.

In this problem, you have to write a program to reverse an array of size n entered by the user. Reversing an array means changing the order of elements so that the first element becomes the last element and the second element becomes the second last element and so on.

Reverse an array

Q15: Write a Program to rotate the array to the left.

In this problem, you have to write a program that takes an array arr[] of size N from the user and rotates the array to the left (counter-clockwise direction) by D steps, where D is a positive integer. 

Q16: Write a Program to remove duplicates from the Sorted array.

In this problem, you have to write a program that takes a sorted array arr[] of size N from the user and removes the duplicate elements from the array.

Q17: Write a Program to search elements in an array (using Binary Search).

In this problem, you have to write a program that takes an array arr[] of size N and a target value to be searched by the user. Search the target value using binary search if the target value is found print its index else print ‘element is not present in array ‘.

Q18: Write a Program to reverse a linked list.

In this problem, you have to write a program that takes a pointer to the head node of a linked list, you have to reverse the linked list and print the reversed linked list.

Q18: Write a Program to create a dynamic array in C.

In this problem, you have to write a program to create an array of size n dynamically then take n elements of an array one by one by the user. Print the array elements.

Q19: Write a Program to find the Transpose of a Matrix.

In this problem, you have to write a program to find the transpose of a matrix for a given matrix A with dimensions m x n and print the transposed matrix. The transpose of a matrix is formed by interchanging its rows with columns.

Q20: Write a Program to concatenate two strings.

In this problem, you have to write a program to read two strings str1 and str2 entered by the user and concatenate these two strings. Print the concatenated string.

Q21: Write a Program to check if the given string is a palindrome string or not.

In this problem, you have to write a program to read a string str entered by the user and check whether the string is palindrome or not. If the str is palindrome print ‘str is a palindrome’ else print ‘str is not a palindrome’. A string is said to be palindrome if the reverse of the string is the same as the string.

Q22: Write a program to print the first letter of each word.

In this problem, you have to write a simple program to read a string str entered by the user and print the first letter of each word in a string.

Q23: Write a program to reverse a string using recursion

In this problem, you have to write a program to read a string str entered by the user, and reverse that string means changing the order of characters in the string so that the last character becomes the first character of the string using recursion. 

reverse a string

Q24: Write a program to Print Half half-pyramid pattern.

In this problem, you have to write a simple program to read the number of rows (n) entered by the user and print the half-pyramid pattern of numbers. Half pyramid pattern looks like a right-angle triangle of numbers having a hypotenuse on the right side.

Q25: Write a program to print Pascal’s triangle pattern.

In this problem, you have to write a simple program to read the number of rows (n) entered by the user and print Pascal’s triangle pattern. Pascal’s Triangle is a pattern in which the first row has a single number 1 all rows begin and end with the number 1. The numbers in between are obtained by adding the two numbers directly above them in the previous row.

Pascal’s Triangle

Q26: Write a program to sort an array using Insertion Sort.

In this problem, you have to write a program that takes an array arr[] of size N from the user and sorts the array elements in ascending or descending order using insertion sort.

Q27: Write a program to sort an array using Quick Sort.

In this problem, you have to write a program that takes an array arr[] of size N from the user and sorts the array elements in ascending order using quick sort.

Q28: Write a program to sort an array of strings.

In this problem, you have to write a program that reads an array of strings in which all characters are of the same case entered by the user and sort them alphabetically. 

Q29: Write a program to copy the contents of one file to another file.

In this problem, you have to write a program that takes user input to enter the filenames for reading and writing. Read the contents of one file and copy the content to another file. If the file specified for reading does not exist or cannot be opened, display an error message “Cannot open file: file_name” and terminate the program else print “Content copied to file_name”

Q30: Write a program to store information on students using structure.

In this problem, you have to write a program that stores information about students using structure. The program should create various structures, each representing a student’s record. Initialize the records with sample data having data members’ Names, Roll Numbers, Ages, and Total Marks. Print the information for each student.

We hope after completing these C exercises you have gained a better understanding of C concepts. Learning C language is made easier with this exercise sheet as it helps you practice all major C concepts. Solving these C exercise questions will take you a step closer to becoming a C programmer.

Frequently Asked Questions (FAQs)

Q1. what are some common mistakes to avoid while doing c programming exercises.

Some of the most common mistakes made by beginners doing C programming exercises can include missing semicolons, bad logic loops, uninitialized pointers, and forgotten memory frees etc.

Q2. What are the best practices for beginners starting with C programming exercises?

Best practices for beginners starting with C programming exercises: Start with easy codes Practice consistently Be creative Think before you code Learn from mistakes Repeat!

Q3. How do I debug common errors in C programming exercises?

You can use the following methods to debug a code in C programming exercises Read the error message carefully Read code line by line Try isolating the error code Look for Missing elements, loops, pointers, etc Check error online

Please Login to comment...

Similar reads, improve your coding skills with practice.

What kind of Experience do you want to share?

• Election 2024
• Entertainment
• Newsletters
• Photography
• Personal Finance
• AP Investigations
• AP Buyline Personal Finance
• AP Buyline Shopping
• Press Releases
• Israel-Hamas War
• Russia-Ukraine War
• Global elections
• Asia Pacific
• Latin America
• Middle East
• Election Results
• Delegate Tracker
• AP & Elections
• Auto Racing
• 2024 Paris Olympic Games
• Movie reviews
• Book reviews
• Financial Markets
• Business Highlights
• Financial wellness
• Artificial Intelligence
• Social Media

Cubs sign veteran catcher Tomás Nido, designate Yan Gomes for assignment

New York Mets pitcher Reed Garrett, right, celebrates with catcher Tomás Nido, left, after a baseball game against the Arizona Diamondbacks, Friday, May 31, 2024, in New York. (AP Photo/Frank Franklin II)

Chicago Cubs catcher Yan Gomes, left, celebrates with relief pitcher Keegan Thompson after the Cubs defeated the San Francisco Giants in a baseball game in Chicago, Tuesday, June 18, 2024. (AP Photo/Nam Y. Huh)

• Copy Link copied

CHICAGO (AP) — The Chicago Cubs signed veteran catcher Tomás Nido and designated Yan Gomes for assignment on Wednesday.

The 30-year-old Nido was released by the New York Mets on Monday after being designated for assignment last week. He was hitting .229 with three home runs and eight RBIs.

Nido was drafted by New York in 2012 and was the second longest-tenured player on the team behind Brandon Nimmo. The 30-year-old catcher, who remained with the organization after being designated for assignment last June, thanked the Mets with a heart emoji on the social media platform X.

Gomes, a 13-year veteran, is batting a career-low .154 with two home runs and seven RBIs in 34 games this season. Miguel Amaya has been getting most of the starts at catcher.

The 36-year-old Gomes spent 2 1/2 seasons in Chicago, batting .241 with 20 homers and 101 RBIs in 236 games. He was an All-Star with Cleveland in 2018 and played on a World Series champion with Washington in 2019.

The Cubs also placed right-hander Keegan Thompson on the paternity list and recalled righty Porter Hodge. Thompson is 1-1 with one save and a 4.30 ERA in 11 games.

AP MLB: https://www.apnews.com/hub/MLB

• Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers
• Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand
• OverflowAI GenAI features for Teams
• OverflowAPI Train & fine-tune LLMs
• Labs The future of collective knowledge sharing
• About the company Visit the blog

Collectives™ on Stack Overflow

Find centralized, trusted content and collaborate around the technologies you use most.

Q&A for work

Connect and share knowledge within a single location that is structured and easy to search.

Get early access and see previews of new features.

Assignment Within the Check of a While Loop

I was trying out the following basic summation program using while loops:

I'm having some trouble understanding why the while loop executes even if the user enters 0.

• Reading references of functions/operators is better way to learn c++ than just wild guessing. –  kotlomoy Commented May 23, 2013 at 18:34

2 Answers 2

(std::cin >> userIn) will be != 0 if the input succeeded, not if the input was 0 .

To check both, you can do while ( (std::cint >> userIn) && userIn ) . This will first make sure that the input succeeded and then that the number is actually non-zero.

It would be beneficial for you to get used to reference pages like http://www.cplusplus.com/reference/istream/istream/operator%3E%3E/

It describes the return value of the operator>>() function, which is the istream (cin) objects itself. This means that

while((std::cin >> userIn) != 0)

will not do what you expect it to do, and the loop will actually never be broken.

What you're actually looking for is something along the lines of

Your Answer

Reminder: Answers generated by artificial intelligence tools are not allowed on Stack Overflow. Learn more

Sign up or log in

Post as a guest.

Required, but never shown

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy .

Not the answer you're looking for? Browse other questions tagged c++ while-loop io or ask your own question .

• Featured on Meta
• Upcoming sign-up experiments related to tags
• The return of Staging Ground to Stack Overflow
• Should we burninate the [lib] tag?
• Policy: Generative AI (e.g., ChatGPT) is banned
• What makes a homepage useful for logged-in users

Hot Network Questions

• Is Légal’s reported “psychological trick” considered fair play or unacceptable conduct under FIDE rules?
• Why depreciation is considered a cost to own a car?
• How can I take apart a bookshelf?
• Is there a way to non-destructively test whether an Ethernet cable is pure copper or copper-clad aluminum (CCA)?
• Old book about a man who finds an abandoned house with a portal to another world
• "All due respect to jazz." - Does this mean the speaker likes it or dislikes it?
• How can these passive RLC circuits change a sinusoid's frequency?
• How to produce this table: Probability datatable with multirow
• Have there been any scholarly attempts and/or consensus as regards the missing lines of "The Ruin"?
• What is the translation of misgendering in French?
• Cleaning chain a few links at a time
• Is there a smooth function, which is in L^1, but not in L^2?
• What is the original source of this Sigurimi logo?
• Did James Madison say or write that the 10 Commandments are critical to the US nation?
• How do I get my D&D group to engage to a minimum
• Why can Ethernet NICs bridge to VirtualBox and most Wi-Fi NICs don't?
• How to join two PCBs with a very small separation?
• Why is polling data for Northern Ireland so differently displayed on national polling sites?
• Why was William Tyndale executed but nothing happened to Miles Coverdale?
• Applying Bayesian probability to a generalized Monty Hall problem
• Check for key in dictionary without magic value comparison
• Algorithm to evaluate "connectedness" of a binary matrix
• Aligning definition of terms of a sequence
• Stiff differential equation