programe to add digits in C

#include <stdio.h>

int main()
{
   int n, sum = 0, remainder;

   printf("Enter an integer\n");
   scanf("%d",&n);

   while(n != 0)
   {
      remainder = n % 10;
      sum = sum + remainder;
      n = n / 10;
   }

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

   return 0;
}