Fizz Buzz

fizz_buzz.ex

defmodule Streem do
  def fb(n) when rem(n,15) == 0, do: "FizzBuzz"
  def fb(n) when rem(n,3) == 0, do: "Fizz"
  def fb(n) when rem(n,5) == 0, do: "Buzz"
  def fb(n), do: n
end

fizz_buzz_case.ex

defmodule Streem do
  def fb(n) do
    case n do
      n when rem(n, 15) == 0 -> "FizzBuzz"
      n when rem(n, 3) == 0 -> "Fizz"
      n when rem(n, 5) == 0 -> "Buzz"
      _ -> n
    end
  end
end

run.ex

0..1000
|> Enum.map &(Streem.fb(&1))
|> IO.puts