[Codewars] Multiples of 3 or 5

Q. If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Finish the solution so that it returns the sum of all the multiples of 3 or 5 below the number passed in.

Additionally, if the number is negative, return 0.

Note: If the number is a multiple of both 3 and 5, only count it once.

 

S.

int solution(int n) {
  int result = 0;
  for (var i = 3; i < n; i++) {
    result += (i % 3 == 0 || i % 5 == 0) ? i : 0;
  }
  return result;
}