How to use variables
That's enough theory. Let's see how we would 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 type int with the name score, we would type:
int score;
That's it. Simply state the type, in this case, int, then leave a space and type the name you want to use for the variable. Note also the semicolon ; on the end of the line will tell the compiler that we are done with this line and 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 in the warehouse. The variable names used next are arbitrary.
long millisecondsElapsed...
