Changes

===Variables===

===Variables===

Variables are named storage places in memory that can hold data.  The kind of data stored in variables depends upon the data type of the variable.  Naming conventions differ between them, but typically variable names start with an alpha character (A-Z or a-z), and can contain alphanumeric and underscore characters.

Variables are named storage places in memory that can hold data.  The kind of data stored in variables depends upon the data type of the variable.  Naming conventions differ between languages, but typically variable names start with an alpha character (A-Z or a-z), and can contain alphanumeric and underscore characters.

===Data Types===

===Data Types===