Understanding Typed Variables

To create even modest Java programs, we're going to need a way to store and manipulate information. Our chief resource, when doing this, is the variable, and that's what we're going to take a look at in this chapter. We'll look at the different data types in Java and how to use them in our programs. We'll also see the Math class library and one of its functions.

Specifically, we'll walk through the following topics:

• Introduction to variables and why they're needed
• Integer variables
• Floating-point variables
• The Math class library and its pow() function
• Character variables
• The String class and its methods