# Naming conventions for Apps variables

> Naming rules for Apps variables, including allowed characters, required first character format, and maximum length constraints.

In creating App Variables names, specific guidelines have been set to ensure safety against malicious scripting:

* Names can only include alpha-numberic characters, underscore `_` , and the dollar sign `$` characters.
* The first character must be alphabetic.
* The maximum length is 128 characters.