Luau (programming language)

Luau

Family	Lua (programming language)
Developer	Roblox Corporation
First appeared	27 August 2019
Implementation language	C++, Lua
Platform	Roblox Studio
OS	Windows, MacOS
License	MIT License
File formats	.rbxm
Website	https://luau-lang.org

Luau is a dialect of the programming language Lua, developed by Roblox Corporation for use in Roblox Studio to create games on Roblox. A derivative of Lua 5.1, Luau supports gradual typing and is designed to maximize performance.

Examples

Instances refers to objects in the game and some of them can be parented and some have a "child".

Part spawns in constant code

Here's an example code for spawning a "Part" (Roblox Block instance, shown here as "brick") every 10 second. Spawning in the position 0, 0, 0. "game" refers to the game itself. "Workspace" is where the player can interact, a 3D environment. "CFrame" is used as the position of "brick".

while wait(10) do
    local brick = instance.new("Part")
    brick.parent = game.Workspace
    brick.position = CFrame.new(0, 0, 0)
end

Note that "Workspace" is a child of "game". This script is a "Script" instance and it's placed in "ServerScriptService", a parent of "game".

Function codes

Another example is to use custom functions and instance's "Signal". If the instance has triggered a change, the signal will be fired. In this example, instance "Button" has a "ClickDetector" which fires the signal "MouseClick" whenever "Button" is pressed. "Connect(<Name Of The Function To Run>) is to run the function in the parenthesis whenever the Signal is fired. This time we are going to run a custom function called "onClicked()" and it will change "Button's" colour and material.

Button = script.parent

function onClicked()
button.BrickColor = BrickColor.new("Medium Stone Grey")
button.Material = Enum.Material.DiamondPlate
end

Button.ClickDetector.MouseClick:Connect(onClicked)

Adding comments

See the code block below to see the example of comments.

--See here for the use of comments 

--This is an example comment
--[[This is an example of Multi-line comment
hello world,
This is a Wikipedia edit.]]