Let’s say we have the following module
defmodule Reminder do def alarm(time, day) do end end
We can check what methods are on it by providing a
Reminder.__info__(:functions) # [alarm: 2]
As we can see, this Reminder module has an alarm method, with an arity of 2.
The iex interpreter includes a function called h which can be used to show documentation for a module
h String # h/1
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