IO.puts(1 + 2)
IO.puts(5 * 20)
IO.puts(10 / 2)

IO.puts(:dane)
IO.puts("some" <> "test")

string = "oh"
IO.puts("#{string} no!!")

age = 31
IO.puts("i am #{age}, i am old as shit")
IO.puts("first line\nsecond line")
IO.puts(String.length("dane"))
IO.puts(String.upcase("scream"))