Elixir: When to use .ex and when .exs files

Question

Elixir\'s documentation states that

In addition to the Elixir file extension .ex, Elixir also supports .exs files for scripting. Elixir treats both

Answer 1

I check it in Elixir version 1.9.1 and both extensions .ex, .exs will be compiled with elixirc. Another words, we get bytecode (.beam file) in both cases.