Question

Write a C program that reverses a number that is entered by the user by making use of do-while loop. How is this looping technique different from while loop?

Answer 1

C Program to reverse digits of a number using do while loop

#include<stdio.h>

#include<conio.h>

void main()

{

 int num;

 int rev=0, rem=0;

 printf("\n Enter a number: ");

 scanf("%d",&num);

 do

 {

   rem = num%10;

   rev = rev*10+rem;

   num = num/10;

 }while(num>0);

 printf("\n reverse number = %d",rev);

 getch();

}  

repeat loop will execute at least one iteration whereas while loop may not execute one iteration also if the condition is not fulfilled