meet it

Put something new in a box and the old thing is gone.

A box holds one value at a time. Put a new value in and the old one is thrown away. We say you it. Write the type only once, when you first make the box.

You can copy one box into another, like String order = drink;. You can also strings with +, which sticks them end to end, so mind the spaces.

A box can even use its own value. score = score + 1; takes what is in score, adds one and puts the answer back in.

public class Main {
    public static void main(String[] args) {
        String drink = "tea";
        drink = "coffee";
        System.out.println("I would like " + drink);
        int score = 5;
        score = score + 1;
        System.out.println(score);
    }
}

When you join strings, put any spaces you need inside the quotes.

guess first

Copy, then change. What will this show?

Guess before you run it. Wrong guesses are how you learn, and nothing is marked.

public class Main {
    public static void main(String[] args) {
        String drink = "tea";
        String order = drink;
        drink = "coffee";
        System.out.println(order);
    }
}

your turn

Your turn. Change the weather.

Type tomorrow's weather between the quotes on line 5, then press run to see the box change.

Your code

output

press run to see what happens

fix it

Losing a life crashed the game. Can you fix it?

Broken code to fix

output

press run to see what happens

Java says lives is already defined. Which two lines both start with int?
Line 5 starts with a type, so it tries to make a second box. You only want a new value in the old one.
Delete int at the start of line 5, so it says lives = 2;, then press run.

nailed it

your boxes can change now. :D

A new value overwrites the old one.
Write the type only once, when you make the box.
+ joins strings. Put spaces inside the quotes.

new words in your collection

overwrite
join

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