Yeah, it's also fun that you can do it in a multiple function head pattern matchy way

  defmodule FizzBuzz do
    def fizzbuzz(x),          do: fizzbuzz(x, {rem(x, 3), rem(x, 5)})
    def fizzbuzz(_x, {0, 0}), do: IO.puts "fizzbuzz"
    def fizzbuzz(_x, {0, _}), do: IO.puts "fizz"
    def fizzbuzz(_x, {_, 0}), do: IO.puts "buzz"
    def fizzbuzz(x,  {_, _}), do: IO.puts x
  end

  Enum.each Range.new(1, 100), &FizzBuzz.fizzbuzz/1

or in a more ruby-esque fashion

  (1..100) |> Enum.each fn(x) ->
    cond do
      rem(x, 3) == 0 and rem(x, 5) == 0 ->
        IO.puts "fizzbuzz"
      rem(x,5) == 0 ->
        IO.puts "buzz"
      rem(x,3) == 0 ->
        IO.puts "fizz"
      true ->
        IO.puts x
    end
  end