Bilangan Kelipatan 3

public class three{
    public static void main(String[] args){
        boolean first = true;

        for (int i = 0; i < 50; i++){
            if (i % 3 == 0 && first == false){
                 System.out.print(i);
                 if(i % 15 != 0)
                    System.out.print(",");
            }
            if(i % 15 == 0)
                System.out.println();
            first = false;
        }
    }
}