Variables

A variable provides us with named storage that our programs can manipulate. Each variable in Java has a specific type, which determines the size and layout of the variable's memory; the range of values that can be stored within that memory; and the set of operations that can be applied to the variable.

 

Variable Declaration and Initialization

You must declare all variables before they can be used. Java variables are declared by specifying the data type followed by the variable name. To assign a value, use the assignment (=) operator followed by the value. Each declaration or initialization statement must end with a semicolon (;).