iex> :" multi
...>  line ' \s \123 \x20
...> atom"
:" multi\n line '   S  \natom"

iex(1)> <<"hello"::binary, c :: utf8, x::[4, unit(2)]>> = "hello™1"
"hello™1"

iex(2)> c
8482

iex> 1 + :atom
** (ArithmeticError) bad argument in arithmetic expression
    :erlang.+(1, :atom)

iex(3)> 1 +
...(3)> 2 +
...(3)> 3
6

iex> IO.puts "Hello world"
Hello world
:ok