answer java programs for Eular projects-problem1

PROBLEM 1

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.

Find the sum of all the multiples of 3 or 5 below 1000.

ANSWER
233168

JAVA CODE



public class NaturalNumber {

 public static void main(String[]args){
  int sum=0;
  for (int i = 3; i < 1000; i++) {
   if(i%3==0)
    sum+=i;
   else if(i%5==0)
    sum+=i;
  }
  System.out.println(sum);
 }
}