hello.exs

defmodule Hello do
  def world do
    IO.puts "hello"
  end
end

defmodule Fib do
  def fib(0) do 0 end
  def fib(1) do 1 end
  def fib(n) do fib(n-1)+fib(n-2) end
end

defmodule Q do
  def sort([]) do [] end
  def sort([h|tail]) do
    a = []
    b = []
    Enum.map tail, fn(x)->
      if x < h do
        a = a++[x]
      else:
        b = b++[x]
      end
    end
    IO.puts a
    IO.puts b
    sort(a)++[h]++sort(b)

  end
end

Hello.world
IO.puts Fib.fib(11)
IO.puts Q.sort [4,2,3,8,5,4,7,9,2,5,2,7]