import java.util.*;

class DataOnly {
  static int i;
  static double d;
  static boolean b;

  public static void main(String[] args) {
    i = 10;
    System.out.println(i);

    d = 10.4f;
    System.out.println(d);

    b = true;
    System.out.println(b);
  }
}

Add exercise 5