4. Write a program to find reverse of a given number.

#include<stdio.h>

#include<conio.h>

void main()

{

    long int no,i,rem,rev=0;

    clrscr();

    printf("enter number: ");

    scanf("%ld",&no);

    for(i=0; no>0; i++)

    {

        rem = no % 10;

        rev = rev * 10 + rem;

        no = no / 10;

    }

    printf("\n\nreverse number is: %ld",rev);

    getch();

}

/*      output:

enter number: 12243

reverse number is: 34221

*/