Print Information about an Elixir Data Type

IEx ships with a neat feature, def i(term \\ v(-1)), which provides information about an argument. Here are two examples:

iex(1)> i ["one", "two"]
Term
  ["one", "two"]
Data type
  List
Reference modules
  List
Implemented protocols
  IEx.Info, Collectable, Enumerable, Inspect, List.Chars, String.Chars

iex(1)> i "three"
Term
  "three"
Data type
  BitString
Byte size
  5
Description
  This is a string: a UTF-8 encoded binary. It's printed surrounded by
  "double quotes" because all UTF-8 encoded codepoints in it are printable.
Raw representation
  <<116, 104, 114, 101, 101>>
Reference modules
  String, :binary
Implemented protocols
  IEx.Info, Collectable, Inspect, List.Chars, String.Chars

Use this to inspect an item, or learn more about Elixir.