C program to find sum of the digits of the Number with Recursion.

Program:

#include <stdio.h>

int digit_sum(int n){

    int d=0;

    

    if(n==0)

        return 0;

    else

        d=n%10;

        return d+digit_sum(n=n/10);

}

int main(){

    int n;

    printf("Enter the Number: ");

    scanf("%d",&n);

    printf("\n\t-->> Sum Of the Digit of %d is %d . \n",n,digit_sum(n));

}

Expected O/P:

Enter the Number: 4563

-->> Sum Of the Digit of 4563 is 18 .