A fast, small, safe, gradually typed embeddable scripting language derived from Lua What is Luau? Luau is a High end programming language implemented by Roblox Corporation in 2019, it is based on Lua 5. Nov 27, 2022 · I’d rather call it “Learn luau syntax” or “Roblox Create Scripting summary”, good contribution. This includes recognizing files as using Luau programming language and having support for syntax highlighting. By default, these are built with all syntax variants enabled (Lua 5. Dec 11, 2019 · Roblox LSP provides large amounts of IntelliSense for Luau, and has neat tricks like adding end to your if statements. This can result in better performance for games and other experiences developed on the Roblox platform. I wanted to see what it does, but had no idea how to use it. More information about the terminal nodes STRING and NUMBER is available in the syntax section. Luau eventually plans to implement JIT on some platforms, but this is subject to careful memory safety analysis and is likely to not be deployed for client-side scripts, as the extra risk involved in JITs is much more pronounced when it may affect players. html ; Luau Syntax Docs: h Aug 31, 2024 · Script Execution in one click! Import your . Type checking helps you find bugs early - while you’re writing code - rather than discovering when your program crashes at runtime. Export your script as a . Feb 12, 2023 · The main difference between Lua and Luau is that Luau has a number of performance optimizations that make it faster and more efficient than regular Lua. Luau originally denoted only the leaves of the taro plant, which are eaten as a vegetable; it came to refer to the dishes prepared with the leaves and then to the feasts at which the dishes were eaten. Sep 20, 2021 · Luau is expected to, and definitely has a lot of things still planned, apparently there were some talks here and there about OOP syntax sugar coming to Luau, such thing would have to be added to it’s syntax highlighting on the forum later, so such task is better off waiting until such thing is implemented first. Syntax Grammar This is the complete syntax grammar for Luau in EBNF. Celes Lua. One way of defining tables is using the {type} syntax, which defines a list type. How could I fix these? Here’s one attempt from some one part of the code. Planning your first trip to Hawaii and want to know what to expect at a luau in Hawaii? Keep scrolling to get all your Hawaii luau questions answered. 1 with additional features, performance improvements, and a powerful type system while maintaining backward compatibility. 1, which means if Lua 5. org/why ; Lua 5. Experience a true Hawaiian feast (known as a luau) during your visit to Hawaii. This post about what to expect at a luau in Luau, a modern Hawaiian banquet. Nov 27, 2022 · Added a part explaining how to create instances and filled in a blank about how modulescripts work and how to network. Functions are a Luau data type, so you can store them in tables with other data. Luau uses the standard Lua syntax for iterating through containers, for vars in values, but extends the semantics with support for generalized iteration. Whether you’… Mar 19, 2023 · This is for me and for yall. H. This repository hosts the official Luau website, accessible on https://luau. org/manual/5. Workspace. It’s an exciting event that captures the essence of Hawaiian culture, showcasing vibrant music, hula dancing, and a delectable array of food. For detailed documentation, please refer to the Lua manual, this is an example: The Script Editor in Studio supports Luau with autocompletion, syntax highlighting, static linting, type checking, and script analysis. Its optional JIT compiler runs on x64 and arm64, and supports plugins that extend native code generation to any embedder-defined types. For Hawaiians, hosting a luau is an expression of hospitality and generosity, inviting guests to partake in their cultural heritage and to learn about the values that have shaped the islands’ history. g. print () is a variadic function. This project doesn't support Luau static typing and never will, you should always prefer Luau Language Server for that. 1. Apr 4, 2025 · Hi, I have a forum based around luau/lua scripting and would love to have support for the lua syntax on my forum (even better if you could support luau as well). Visual Studio Code> Programming Languages> Roblox Lua/Luau Highlighting New to Visual Studio Code? Get it now. luaurc file to use third-party processing tools though, e. In order to instantiate a table with elements the syntax will look something like this: Language Support The following languages and Language Servers are supported. org, August 2006 ISBN 85-903798-3-3 Buy a copy of this book and help to support the Lua project. In Lua, to iterate over a table you need to use an iterator like next or a function that returns one like pairs or ipairs. lua does Is your feature request related to a problem? Start your journey in Roblox scripting to create anything you imagine! - Free Course However, there are times where 2 different syntax definitions conflict, introducing ambiguity. Jul 28, 2025 · Luau (pronounced "lu-ow") is a fast, small, safe, gradually typed embeddable scripting language derived from Lua. 1 Reference Manual by R. lua, . 1 (code that is valid Lua 5. Does anyone know what it does and how to use it? I am looking forward to learning about this. It is not used specifically for instantiating tables. Oct 3, 2023 · Syntax The syntax for an empty table is: local table = {} Tables can be defined using curly braces ({}). To use Language Server features, you must first configure the appropriate Language Server May 5, 2021 · Lua 5. It extends Lua 5. This manual is also available as a book: Lua 5. 5 days ago · Luau are synonymous with going on a trip to Hawaii, but not all of them are authentic. Functions in module scripts You can reuse functions across multiple scripts by storing them in ModuleScripts. Syntax Luau uses the baseline syntax of Lua 5. I’d rather call it “Learn luau syntax” or “Roblox Create Scripting summary”, good contribution. lua or Roblox file. In this example, I want to have a function convert a given array’s values from instances to their names. Now, you can select a particular style of syntax at runtime to deal with these ambiguities. Luau is syntactically backwards-compatible with Lua 5. 1 that you may see in other languages, however. Whenever new syntax is introduced, we need to ask: Is it backwards compatible? Is it easy for machines and humans to parse? Does it create grammar ambiguities for current and future Aug 11, 2020 · Thanks for making this! I wanted to use Luau syntax with sumneko’s version and tried to make a simple fork, but I couldn’t figure out how to compile/install my changes - and even if I had, it wouldn’t have had nearly as many features! RFCs for Luau evolution 2-component vector constructor Abstract module paths and init. 1 code, so yes, this is most likely a return type for IntelliSense Background Whenever Luau language changes its syntax or semantics (including behavior of builtin libraries), we need to consider many implications of the changes. 4, LuaJIT and Luau), to cover all possible codebases. elseif support We discussed a simpler version of this 21K subscribers in the lua community. The syntax is described here. See configuring runtime syntax selection if you need to select a particular syntax of Lua to format. It also makes the syntax more cumbersome to use and could lead to developers sticking with the error-prone a and b or c alternative. The name "Lua" means "moon" in Portuguese, and just like the moon, Lua is small, lightweight, and adaptable to many environments. LuaGlobals. txt files from your computer. de Figueiredo, W. Thus, use of end here would be inconsistent with its other uses in the language. However, there is not type checking, but i’m planning to implement it in a future update. luau, and . 2, 5. 1, as well as incorporating some features from future Lua releases, but also expands the feature set (most notably with type annotations). 6 Use for loops to repeat code in this lesson for Luau. Timestamps00:00 - Intro01:19 - Numbers01:51 - Strings02 A maybe helpful summary of the luau docs. luau Always call __eq when comparing for equality Amended Require Syntax and Resolution Semantics An official mascot for Luau Array-like table types Attributes (for Functions) Byte buffer type Change _VERSION global to “Luau” Compound assignment using op= syntax Configure analysis via . News and discussion for the Lua programming language. io on how to install a particular flavour of StyLua. willing to pay money for anyone that can assist me with this. luaurc. roblox uses luau a modified version of Lua 5. org, including all the user-facing language documentation therein. Jun 18, 2022 · The Syntax Highlighting for Lua is pretty awful for being Roblox’s coding language. - luau-lang/luau RFCs for Luau evolution The end here is unnecessary since c is not a block of statements – it is simply an expression. Sep 13, 2022 · Is this using a Lua based linter or a Luau one? If its the former, you wont have access to the additional type syntax Nov 19, 2020 · 10 months ago, we’ve started upon the journey of helping Roblox scripters write robust code by introducing an early beta of type checking. Luau does not have a table type; instead, table types are defined using {} syntax. 1/manual. Dancing and music accompany the feast. UI that just feels responsive Runs in any In Luau, there’s no first-class module system that’s part of the syntax, but require function acts as an import statement. Variadic functions A variadic function accepts any number of arguments. Here’s the lowdown on the history of the luau, what modern takes entail, and why you should book one on your next Hawaiian holiday. It also shows documentation and function signatures for members of the Roblox Engine API. All of the C# snippets have bad syntax highlighting that doesn’t seem to be set correctly. Another option would be to prefix < with a disambiguator like someFunction::<A, B> which is what Rust does. space/docs/ This makes it more difficult to repurpose the . Alternatively, see installing from crates. Name end return Array end Pretty simple. 3, 5. Jun 10, 2023 · So, I was just looking at random things in the script editor, when I saw the export keyword. 1 can run it, Luau can run it. I think that they’re actually using the Luau syntax highlighting, it’s global across the entire site 2 months later Syntax Luau is syntactically backwards-compatible with Lua 5. Extension for Visual Studio Code - Support for Roblox's Luau language. luaurc Default type Nov 10, 2020 · 0 Rojo is a tool that can connect to external text editors such as VS Code and allows you to use syntax highlighting for LuaU: https://rojo. An introduction to scripting in Roblox with the Luau programming language. 2 label syntax (::label::) conflicts with Luau's type assertion syntax (x :: number), and the latter ends up taking priority. Advanced Editor for advanced scripting. Lua Vs Luau What is Lua? Lua is a lightweight, flexible programming language designed to be simple yet powerful. Oct 26, 2023 · Luau supports escape sequences essential in strings to represent special characters or formatting that cannot be directly typed. --Thanks For Watching--Link:-- [ Story: https://luau-lang. Using Selene (Optional) Selene is a linter created by @Kampfkarren. Luau has some extra features missing from Lua 5. This continued from the birth of Roblox until July 23, 2012, when Roblox Studio was released publicly. Before the release of Roblox Studio, creating places was possible using RobloxApp. For example, Globals. Today I’m incredibly excited to announce that the Jan 7, 2021 · I am trying to figure out how to use this Luau type-checking stuff, and I’m experimenting with some basic functions to start with. Dec 3, 2025 · Roblox Studio is an IDE[1] developed by Roblox Corporation, offering an assortment of building and scripting tools as well as testing, debugging and collaboration tools for development on Roblox. using 2. 1 Syntax: https://www. a package manager would need to learn how to parse Luau syntax to store configuration in . Sep 4, 2023 · Hey there! So currently I’m trying to learn a bit of Luau but its kind of confusing to me but, I’m working on train system and I’m trying to make it compatible with Luau, but I’m getting underlines on some parts of the code when I strict it. Features Full Roblox Environment Full support for Rojo Built-in support for Roact, Rodux, and TestEz. 1 and it's optimised for performance and error-handling making it well suited for Roblox Game creation There aren't very many differences between Lua and Luau syntax, however Luau An introduction to Luau types Luau supports a gradual type system through the use of type annotations and type inference. Release Notes for Roblox Studio Version 704 A lūʻau (Hawaiian: lūʻau, also anglicized as "luau") is a traditional Hawaiian party or feast that is usually accompanied by entertainment. 1 Reference Manual The reference manual is the official definition of the Lua language. Sep 8, 2025 · I'd like for Warp to add Luau syntax highlighting or allowing the . aʊ/) is a fast, small, safe, gradually typed embeddable scripting language derived from Lua. This is a pretty basic codeblock, using ```lua print ("lol") for i, v in ipairs (game. Changes to this documentation that improve clarity, fix grammatical issues, explain aspects that haven't been explained before, and the like are warmly welcomed. Luau is a high-performance managed language with a fast bytecode compiler and interpreter, and an optimized, incremental garbage collector. [2] Currently A lūʻau (Hawaiian: lūʻau, also anglicized as "luau") is a traditional Hawaiian party or feast that is usually accompanied by entertainment. Lua is a very powerful language that allows you to overload A lūʻau (Hawaiian: lūʻau, also anglicized as "luau") is a traditional Hawaiian party or feast that is usually accompanied by entertainment. Plan your perfect vacation to the Hawaiian Islands. Auto-completion for instances in Roblox Studio Auto-updatable API Color3 Preview and Picker Module Auto-import IntelliSense Many languages work around this by using some other symbol such as {or [; unfortunately these conflict with other syntax in Lua. We’ve received a lot of enthusiastic feedback and worked with the community on trying to make sure critical issues are addressed, usability is improved and the type system is ready for prime time. Here’s the before: Here is an attempt: I’ve managed to get rid of Aug 10, 2020 · Full Luau Syntax It supports full Luau Syntax! and has basic IntelliSense for Compound Assignments, Continue Statement and types for parameters, variables and returns. When a local is initialized with a require result, and the local is unused, this is classified as “unused import”. Luau Syntax A fast, small, safe, gradually typed embeddable scripting language derived from Lua 1 Like Arbgwaoth (Arbgwaoth) April 1, 2024, 11:20pm 4. For a complete introduction to Lua programming, see the book Programming in Lua. 4 work Dec 23, 2020 · A small, fast, and embeddable programming language based on Lua with a gradual type system. luau file format to use the same syntax highlighting as . A fast, small, safe, gradually typed embeddable scripting language derived from Lua Nov 6, 2023 · Declaring Functions in Luau In Luau, a function is declared using the following syntax: function functionName(parameter1, parameter2, ) <function body> return <return value> end In the code above, a function is declared using the function keyword, functionName is the name of the function (parameter1, parameter2, ) are input variables. Settings menu. Ierusalimschy, L. Workspace:GetChildren ()) do game. Here's the history behind an authentic Hawaiian luau. Script List: a community-powered script library to insert at any time! Script List Library is located here. 1 so their syntax may be different, but all luau code is correct Lua 5. P… Luau (lowercase u, /ˈlu. For example, Lua 5. A luau is a traditional Hawaiian party or feast that is usually accompanied by entertainment. Sep 18, 2025 · This plugin adds support for Luau language Luau LSP integration (Only for IDEs with LSP support)StyLua: format action and ability to use it instead of builtin-in IDEA Taking syntax aside (which doesn’t feel idiomatic or beautiful), <close> isn’t very useful in Luau - its dominant use case is for code that works with external resources like files or sockets, but we don’t provide such APIs - and has a very large complexity cost, evidences by a lot of bug fixes since the initial implementation in 5. Apr 30, 2024 · Our Luau cheat sheet is here to help you dive right into the language, providing concise explanations and code examples for essential concepts like variables… Luau (lowercase u, /ˈlu. local function Array_InstanceToString(Array) for i = 1, #Array do Array[i] = Array[i]. The local keyword is primarily used to declare local variables. The config for Roblox LSP depends on your system setup, so I highly advise Apr 1, 2024 · Ternary conditions syntax is if cond then exp else exp as stated above. These types are used to provide warnings, errors, and suggestions for our developers. Luau comes equipped with a standard library of functions designed to manipulate the built-in data types. 1 is also valid Luau); however, we have extended the language with a set of syntactical features that make the language more familiar and ergonomic. Mar 15, 2025 · My Friend Just developed a syntax highlighter on roblox cause he (Most of the devs on roblox) noticed that highlighting for luau language in vscode is quite bad even though there’s the existance of so called Roblox syntax highlighters. What is function decumentation? a function documentation is for me just a brief introduction to the function and what it does including its arguments that are required or just optional arguments passed through to make our life easier reusing old functions without needing to check what it does and what argument we need especially when we are dealing with table Aug 14, 2020 · Adding syntax to annotate your bindings is very important for the type inference engine to better understand the intended typings. Sep 3, 2014 · ALL ABOUT OOP! Prerequisites An understanding of meta-tables (although the required code will be explained) How tables work and a competent grasp of the Lua syntax Parts What is OOP? How does it help me? How do I make this work in Lua? Integrating with module scripts What about inheritance? What is OOP? OOP stands for Object Orientated Programming and is a way of laying out code in a more This is a standard programming tutorial that aims to teach the syntax of the Lua programming language. These sequences begin with a backslash (\) followed by another character. Now here’s Roblox’s Luau uses the standard Lua syntax for iterating through containers, for vars in values, but extends the semantics with support for generalized iteration. To learn, I checked everywhere, but I couldn’t find a single source. For example, escape sequences permit the use of characters like double quotes or single quotes within a string without causing syntax errors. lua. Note that the library is relatively minimal and doesn’t expose ways for scripts to interact with the host environment - it’s expected that embedding applications provide extra functionality on top of this and limit or sandbox the system Apr 30, 2024 · Our Luau cheat sheet is here to help you dive right into the language, providing concise explanations and code examples for essential concepts like variables, functions, loops, and more. A big thanks goes to our open source community for their generous contributions including pushing for broader Luau support: A lūʻau (Hawaiian: lūʻau, also anglicized as "luau") is a traditional Hawaiian party or feast that is usually accompanied by entertainment. 3. Apr 1, 2025 · Luau, on the other hand, is a modified version of Lua created specifically for Roblox game development. Contribute to worzalla/luau-cheatsheet development by creating an account on GitHub. Aug 16, 2025 · In the Hawaiian language, the word luau translates to "taro plant," and its leaves are baked in coconut milk to accompany different dishes, including squid and chicken, both staples of a Hawaiian luau feast. This lesson explains how for loops work and includes practice scripts. It is designed to be backwards compatible with Lua 5.

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