Challenges

Remember the rules for this are

• Try to use only the information given up to this point in this book.
• Try not to give up until you've given it a solid attempt

Challenge 1

What will this program output when run? Write down your guess and then try running it.

public class Main {
    public static void main(String[] args) {
        String mascot = "The Noid";
        System.out.println(mascot);
        mascot = "Pizza the Hut";
        System.out.println(mascot);
        mascot = "Little Caesar";
        System.out.println(mascot);
    }
}

Challenge 2

Why won't this code run? Make it run by only changing one line.

public class Main {
    public static void main(String[] args) {
        String fruit;
        fruit = "apple"
        
        System.out.println(fruit);
        
        final String vegtable = "carrot";

        System.out.println(fruit);
        System.out.println(vegtable);

        fruit = "orange";
        vegetable = "celery";

        System.out.println(fruit);
        System.out.println(vegtable);
    }
}

Challenge 3

What is the output of this code?

public class Main {
    public static void main(String[] args) {
        String a = "A";
        String b = "B";
        
        b = a;
        a = b;
        b = a;
        a = b;

        System.out.println(a);
        System.out.println(b);
    }
}

Challenge 4

Only adding lines in the middle and without writing "A" or "B" again, make it so that the output of the program is

B
A

public class Main {
    public static void main(String[] args) {
        String a = "A";
        String b = "B";
        // Don't touch above this

        // You can add code here

        // Don't touch below this
        System.out.println(a);
        System.out.println(b);
    }
}

Challenge 5

Some of the variables in this program are named "wrong." Fix them.

public class Main {
    public static void main(String[] args) {
        String apple = "red";
        String clown_car = "polka dot";
        String SeriousCar = "black";
        String FASTRunner = "bolt";
        String slowRunner = "tortoise";
    }
}