4.2 Variables

Variables are the simplest type of references, because each reference is also a variable. Each variable represents a Java object.

Example 4.1. Valid variable names

$foo
$bar
$foo-bar
$foo_bar
$fooBar1

Velocity keeps an internal map from Identifiers to Variables called the Context. This map is where Java code can place objects to be reference from the template.

A variable must be assigned a value before it can be referenced from the template. Assigning a value to a Velocity variable is the same as placing an object in the Context from the Java code of your application.

## Puts a String object representing "bar" in the Context
#set( $foo = "bar" )
[Note]Note

Assigning a new value using the #set statement to a variable does change the object present in the Context.