do-while

Confused with while and do-while?

simple thing- while executes the set of instructions in the loop only if the condition specified is true. On the other hand, do- while executes the set of instructions atleast once what ever the condition may be.

syntax:

while                                                                    do-while

while(i<=10)                                                       do
{                                                                          {
 printf("%d",i);                                                          this;
                                                                                and this;
                                                                           }while(this condition is true);
i++;
}


1.Example program
#include<stdio.h>
#include<conio.h>
int main()
{
while(4<2)
printf("this is while");
return 0;
}


output:
No output will be generated as the condition fails.


#include<stdio.h>
#include<conio.h>
int main()
{
do
   {
      printf("this is do- while");
    }while(5<2);
return 0;
}


output:
this is do-while
since it is do-while the printf statement will be executed atleast once.