Sum of digits of a number in c using for loop code example

Example 1: sum of digits in c using for loop

#include <stdio.h>
int main()
{
   int n, sum = 0, r;

   printf("Enter a number\n");

   for (scanf("%d", &n); n != 0; n = n/10) {
      r = n % 10;
      sum = sum + r;
   }

   printf("Sum of digits of a number = %d\n", sum);

   return 0;
}

Example 2: how to count digits and sum of digits in C

Enter the number
300
Given number = 300
Sum of the digits 300 = 3
 
 
Enter the number
16789
Given number = 16789
Sum of the digits 16789 = 31