Variables

#What is a Variable

A variable is a location in memory that that can hold data that may vary. A variable can be anything from a a number to a string of words. An example of this can be seen in the Strings chapter where we made different literal strings. Numbers can also be variables. In fact, numbers are the main type of variables used when programming. This is especially true when you have a program that will do a lot of math.

#Data Types for Variables

A variable can hold many different values. To hold all these values a variable has many different data types. Below is a table of of the data types for a variable.

Data Type	Description
byte	Byte-length integer
short	Short integer
int	Integer
long	long integer
float	Single-precision floating point
double	Double-precision floating point
char	A single character
boolean	A Boolean value(true or false)

#Defining a Variable

Defining a variable is just as simple as defining a String. All you do is you declare the data type, give it a name and if need be define a value for it.