This article is a portal for reference articles for scripting in Roblox. If you want beginner tutorials instead, go to the Intro_to_Scripting page.

Lua Programming Language

Roblox uses Lua 5.1, a simple scripting language that can be embedded into games or programs (parent applications). Roblox developers have added in functionality to Lua so that users can create interactive content, like tools, buttons, leaderboards, and more in their places. The following links will give you an overview on the language.


The Roblox Wiki offers many tutorials for learning to use Lua in Roblox and using the Roblox studio.

Environments and Libraries

An environment can be described as a place where variables live. Each script has its own environment.

A library is a group of functions that can be used to make scripting easier. For security purposes, some functions have been removed from Roblox to prevent access to system resources. Roblox loads the coroutine, string, table, math, and basic function libraries.

In addition, there are some libraries that Roblox developers have created for use by scripters.


One important feature that all programming languages use is math. For more information, and usage, read the following articles:


Main article: Data Types

All values in Lua have their own type. These values can be stored in variables, passed as arguments to other functions, and returned as results.

Basic Types

Every value in Lua will be one of the following types:

Roblox-Defined Types

These are some of the most commonly used special types created by and available only in Roblox.

  • Vector3 -- Represents 3-dimensional coordinates. These are used for things like a brick's size or position.
  • Vector2 -- Represents 2-dimensional coordinates.
  • CFrame -- Holds a position and a rotation. These define the rotation of bricks.
  • Color3 -- Makes colors using an RGB format.
  • BrickColor -- Defines a specific color for bricks.
  • UDim2 -- Holds a Scale and Offset position for GUIs.

Global Functions and Objects

Main article: Global namespace

Roblox defines the following global variables along with many others. See the Function Dump page for a list of global functions and read on for a list of global objects. Users can create their own Global Functions for use in individual games by making use of the global table.

  • game or Game is a reference to the DataModel instance that is the root of the object hierarchy.
  • workspace or Workspace is a shortcut for the Workspace instance that is a child of the DataModel.
  • script is a reference to the Script instance that is the owner of the referencing code. (Not applicable to Command Bar or plugins.)

Roblox Objects

Objects are what make Roblox work. Everything seen in-game is an object, as well as everything visible in the Explorer panel. All Objects have properties, methods and events. For information about certain objects, search the wiki for the specific object or go to the Class Reference page. Additionally, you can use the Object Browser for a more complete list of objects.

Common Mistakes

The slightest misspelling, or even incorrect capitalization will result in your script failing to work. Remember: Look at the output to check for errors. If this doesn't help, back-track and make sure everything is perfect. If you think there is a problem, or you need help in general, request help on the forum.

See Common Scripting Mistakes and Debugging. For more help, see the 'See Also' section at the bottom of the page.

See also

In the beginning:...

General Information: