This is correct code but still icant figure it out why do we taken that i & d as 4 can anybody** help me **with that .

    int i = 4;
    double d = 4.0;
    String s = "HackerRank ";

    Scanner scan = new Scanner(System.in);

    int i2 = scan.nextInt();      
    double d2 = scan.nextDouble();
    scan.nextLine();              
    String s2 = scan.nextLine();  


    System.out.println(i + i2);
    System.out.printf("%.1f\n", d + d2);
    System.out.println(s + s2);

    scan.close();
}

}