Loops in C with Examples

Here you will learn the different Loops in C with Examples. In this tutorial, we will explain all the different types of loops with details and examples in C programming language.

Table of Contents

What are the loops in C

Loop is a technique that is used to repeat the set of instructions multiple times until a certain condition is met.

How many loops are there in C?

There are three basic types of loops available in C programming.

1. for loop

2. while loop

3. do-while loop

For Loop in C

The for loop is the most commonly used loop in C. It is used to execute a set of statements a certain number of times. The syntax of the for loop is:

Syntax

for (initialization; condition; increment/decrement)

{

// Statements

}

The initialization statement is used to set the initial value of the loop variable.

The condition statement is used to check for the loop termination condition.

The increment/decrement statement is used to update the loop variable.

for loop example in C

//Print 1 to 10 numbers using for loop

#include<stdio.h>

void main()

{

int i;

printf("\n\nprint 1 to 10 numbers using for loop");

for(i=1;i<=10;i++)

{

printf("\n%d",i);

}

Output

while Loops in C

The while loops in c is used to execute a set of statements until a certain condition is met. The syntax of the while loop is:

Syntax

while (condition)

{

// Statements

//increment or decrement

}

while loop example in C

//Print 1 to 10 numbers using While Loop

#include<stdio.h>

void main()

{

int i=1;

printf("\n\nprint 1 to 10 numbers using while loop");

while(i<=10)

{

printf("\n%d",i);

i++;

}

Output

do while Loops in C

The do while loop is similar to the while loop but differs in that the loop body is always executed at least once. The syntax of the do–while loop is:

Syntax

{

// Statements

// increment/ decrement

} while (condition);

do while loop example in C

//Print 1 to 10 numbers using do-while Loop

#include<stdio.h>

void main()

{

int i=1;

printf("\n\nprint 1 to 10 numbers using do-while loop");

{

printf("\n%d",i);

i++;

}while(i<=10);

}

Output

Difference between while and do while loops in C

The differences are given in the following table :-

while loop	do while loop
⮞ The main difference between while and do-while loops is that while loops test the condition before executing the loop body.	⮞ do-while loops execute the loop body once before testing the condition.
⮞ while loop will execute its body as long as the condition remains true,	⮞ do-while loop will execute its body at least once, and then keep executing as long as the condition remains true.