Programming Elixir ≥ 1.6

Names, Source Files, Conventions, Operators, and So On

Elixir identifiers must start with a letter or underscore, optionally followed by letters, digits, and underscores. Here letter means any UTF-8 letter character (optionally with a combining mark) and digit means a UTF-8 decimal-digit character. If you’re using ASCII, this does what you’d expect. The identifiers may end with a question mark or an exclamation mark.

Here are some examples of valid variables:

name    josé   _age   まつもと  _42  адрес!

And some examples of invalid variables:

name•   a±2  42

Module, record, protocol, and behavior names start with an uppercase letter and are BumpyCase. All other identifiers start with a lowercase letter or an underscore, and by convention use underscores ...