Despite not being mentioned in the data types section, functions in Elixir are a type as well–in fact, they are a first-class citizen, as they can be assigned to a variable and passed as arguments to other functions.
As with most functional programming languages, functions are an important type, hence they justify having their own section, away from other built-in types.
We will start by exploring anonymous functions, followed by an explanation of modules and named functions, and then we'll end this section with a quick tour of module attributes and directives.
