maximum.exs

defmodule Exercise1 do
  def maximum([head | tail]) do
    maximum(tail, head)
  end

  defp maximum([], largest_score) do
    largest_score
  end

  defp maximum([head | tail], largest_score) when largest_score > head do
    maximum(tail, largest_score)
  end

  defp maximum([head | tail], _largest_score) do
    maximum(tail, head)
  end
end

[6, 4, 5, 3, 2, 7, 8, 10, 9, 1]
|> Exercise1.maximum
|> IO.inspect