Variables

This chapter covers variables in a little more depth than the Quickstart chapter. Some information will be repeated here so that this chapter can serve as a better reference.

A variable acts like a container for data. It has a type, and a value is assigned to (or stored in) the variable. You can change the value assigned to a variable (called reassignment), but the variable's type is set when it is created and can never be changed. Only values of the appropriate type can be assigned to a variable.