Do while Loop in C Programming language

• In C programming languages, A do while loop is a control flow statement that executes a block of code at least once
• The do…while loop in C programming checks its condition at the bottom of the loop
• A Do-while runs at least once even if the condition is false because the condition is evaluated, after the execution of the body of loop.

Syntax:-

Do
{  
//code to be executed  
}
While (condition);  

Flow chart of do while

For Example

#include<stdio.h>
#include<conio.h>
int main()
{
	int x=0;
	do
	{
		printf("Value of variable x is: %dn", x);
		x++;
	}while (x<=3);
	return 0;
}

Output

Value of variable x is: 0
Value of variable x is: 1
Value of variable x is: 2
Value of variable x is: 3

A Simple Program to illustrator difference between while loop and do while loop

#include<stdio.h>
#include<conio.h>

int main()
{
    int x=0;
    while(x==1)
    {
	printf("while loop Example ");
    }
    printf("Out of loop");


return 0;
}

#include<stdio.h>
#include<conio.h>

int main()
{
   int x=0;
   do
   {
	printf("do-while loop examplen");
   }

while(x==1);
   printf("Out of loop");
return 0;
}