C program to find sum of digits of a number

Example

Input

Input any number: 1234

Output

Sum of digits: 10

/**
 * C program to find sum of its digits of a number
 */

#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;
}

/*
Output :

Enter any number to find sum of its digit: 1234
Sum of digits = 10
*/