How To Enter A Number And Reverse it in C

Input -   123456
Output - 654321

#include<stdio.h>

void main()
{

              int num, rev=0, rem;            //  rev is must be 0 to clear the garbage
              printf("Enter A Nmuber - ");

              scanf("%d",&num);
              while(num>0)                      //  a loop will continue until num is greater than 0
              {
                              rem=num % 10;                      // returns last digit of the number
                              rev= rev *10 + rem;              
                              num=num / 10;                        // reduce one digit every time from num
              }
               printf("Reversed Number= %d",rev);
}

input 123456
output   654321


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