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

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

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

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

#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("Sum of digits:%d", sum);

   return 0;
}

Output:

Enter a number:2314                                                                                                                    
Sum of digits:10