Slip 12 - A) Write a C program to calculate sum of digits of a given input number.[15

Solution:

#include <stdio.h>

int main()

{

    int num, sum=0;

    /* Input a number from user */

    printf("Enter any number to find sum of its digit: ");

    scanf("%d", &num);

    /* Repeat till num becomes 0 */

    while(num!=0)

    {

        /* Find last digit of num and add to sum */

        sum += num % 10;

        /* Remove last digit from num */

        num = num / 10;

    }

    printf("Sum of digits = %d", sum);

    return 0;

}