defmodule HexDoc do

  @moduledoc """
    Provides usefull methods for numbers
  """
  @doc """
    Checking if the number given is pair

    Returns `true` or `false`.

  ## Examples

      iex> HexDoc.is_pair?(8)
      true
  """
  def is_pair?(number) do
    if rem(number, 2) === 0 do
      true
    else
      false
    end
  end

end

IO.puts HexDoc.is_pair?(2)