C Program to find sum of digits of a number using function


In this program, You will learn how to find sum of digits of a number using function in c.


1234 => 1 + 2 + 3 + 4 = 10


Example: How to find sum of digits of a number using function in c

Run it Now
#include<stdio.h>

int digitSum(int n) {
   int r, sum = 0;

   while (n > 0) {
       r = n % 10;
       sum = sum + r;
       n = n / 10;
   }

   return sum;
}

int main() {

   int n, sum = 0;

   printf("Enter a Number :");
   scanf("%d", &n);

   sum = digitSum(n);
   printf("\nSum of Digits is :%d", sum);

   return 0;
}

Output:

Enter a Number :4022
Sum of Digits is :8