Changing variables

Since myNumber is a variable, the value that it stores can vary. If we change what is stored in it, the answer to the equation will also change. Follow these steps:

1. Stop Unity by pressing the Stop button and change 9 to 19 in the Unity Inspector tab
2. Notice that when you restart the game, the answer will be 30

I bet you have noticed the public keyword at the very beginning of the line that declares the myNumber variable. Let me explain what it means. It's called an access modifier. We use these to specify the accessibility of a variable. The public keyword means that the variable can be seen by code outside our script. Look again at the Unity Inspector tab. You can see the value of myNumber there because it is public. The private keyword, however, means that the variable can be accessed only by code in the same class.

Private variables are not visible in the Unity Inspector tab. If you wish to control or view them, make them public.