https://www.lua.org/manual/5.4/manual.html#2.1
Lua possui oito tipos de dados: nil, boolean, number, string, userdata, function, thread, e table .
type(nil) -- nil
type(true) -- boolean
type(1 + 1) -- number
type("Ola") -- string
type(io.stdin) -- userdata
type(print) -- function
type({}) -- table