hridoy

#include<stdio.h>
int main()
{
    int num, div, mod, sum =0, i;

    scanf("%d",&num);

    div = num;

    for(i = 0; div != 0; i++)
    {
        mod = div % 10;
        div = div / 10;
        sum = sum + mod;
    }

    printf("%d",sum);

    return 0;
}