Free all codes

#include < stdio.h >

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

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

  while(n != 0)
  {
  remainder = n % 10;
 /*stores unit place digit to remainder*/
  sum = sum + remainder;
  n = n / 10;
 /*dividing no to discard unit place digit*/
  }

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

  return 0;
}