2.9. Variables

Variables are used to store values of simple and composite data types. In Erlang, they always start with an uppercase letter,^[6] followed by upper- and lowercase letters, integers, and underscores. They may not contain other “special” characters. Examples of variables include the following:

^[6] Variables can also begin with an underscore; these play a role in pattern matching and are discussed in Section 2.11.

A_long_variable_name Flag Name2 DbgFlag