iex> [1, "two", 3, :four] [1, "two", 3, :four] iex> [1, 2, 3] ++ [4, 5, 6] [1, 2, 3, 4, 5, 6] iex> [1, true, 2, false, 3, true] -- [true, false] [1, 2, 3, true] iex> [head | tail] = [1, 2, 3] iex> head 1 iex> tail [2, 3]