whats lua used for 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: how to lua

-- Well, first, you could make a variable

local variable = true

-- If you want to print something in the output
print("Hello Output!")

-- Finally, the rest is up to you.