public static void main(String[] args) { Lamp lamp = new Lamp(); for (int i = 1; i < 10; i = i + 1) { lamp.switchState(); System.out.println(lamp.getState()); } System.out.println("2 mod 2 = " + 2 % 2); System.out.println("3 / 2 (int div) = " + 3 / 2); }