lua : and . code example

Example 1: What is lua used for

Lua is a powerful and fast programming language that is easy to 
learn and use and to embed into your application. 

Lua is designed to be a lightweight embeddable scripting language.
It is used for all sorts of applications, 
from games to web applications and image processing.

-- 

Used commonly in Roblox, Garry's Mod and Multi Theft Auto

Example 2: lua logical and

if 1 == 1 and 2 == 2 then
  print("cool!")
end