How to use variables
That's enough theory. Let's learn how to use our variables and types. Remember that each primitive type needs a specific amount of real device memory. This is one of the reasons that the compiler needs to know what type a variable will be. So, we must first declare a variable and its type before we try to do anything with it.
Declaring variables
To declare a variable of the int type, with the name score, we would type the following:
int score;
That's it. Simply state the type – in this case, int – and then leave a space and type the name you want to use for the variable. Also, note the semicolon ;, at the end of the line. This will tell the compiler that we are done with this line and that what follows, if anything, is not part of the declaration.
Similarly, for almost all the other variable types, the declaration would occur in the same way. Here are some examples. This process is like reserving a labeled storage box...