Learn Lua
Lua is the world's most popular embedded scripting language. It powers Roblox, World of Warcraft addons, Redis, Nginx and countless games. Tiny, fast, elegant — and one of the most satisfying languages to write.
Lua at a Glance
No semicolons. No type declarations. Tables do everything. Clean and direct.
-- Variables (local is best practice)
local name = "Alice"
local score = 95
local active = true
print("Hello, " .. name .. "!")
print("Score:", score)
print("Active:", active)▶ Output
Hello, Alice! Score: 95 Active: true
-- Table as array
local fruits = {"apple", "banana", "cherry"}
print(fruits[1]) -- Lua index starts at 1!
print(#fruits) -- Length: 3
-- Table as dictionary
local student = {
name = "Alice",
score = 95,
}
print(student.name)
print(student["score"])▶ Output
apple 3 Alice 95
-- Multiple return values!
local function minMax(t)
local min, max = t[1], t[1]
for _, v in ipairs(t) do
if v < min then min = v end
if v > max then max = v end
end
return min, max
end
local lo, hi = minMax({4, 7, 1, 9, 3})
print("Min:", lo, "Max:", hi)▶ Output
Min: 1 Max: 9
What You'll Learn
Six beginner-friendly modules — from your first Lua script to coroutines and modules.
Variables & Types
- local vs global
- nil, boolean, number, string
- print() & tostring()
- Type coercion
Control Flow
- if / elseif / else
- Comparison operators
- while & repeat-until
- for loops (numeric & generic)
Functions
- function keyword
- Multiple return values
- Variadic functions ...
- Closures
Tables
- Arrays & dictionaries
- Table methods
- Nested tables
- ipairs & pairs
OOP with Metatables
- Metatables
- __index metamethod
- Creating classes
- Inheritance pattern
Coroutines & Modules
- coroutine.create
- resume & yield
- require() system
- Standard libraries
Explore the Scripting category
Lua is the most popular embedded scripting language. Also explore Bash for terminal automation and PowerShell for Windows scripting.
Frequently Asked Questions
What is Lua used for?
Lua is used extensively for game scripting (Roblox, World of Warcraft, LÖVE 2D), embedded scripting in applications (Redis, Nginx/OpenResty, VLC), and as a lightweight configuration language. It is one of the most widely embedded scripting languages in the world.
Is Lua a good first language?
Lua is beginner-friendly with a very clean, minimal syntax — no semicolons, simple keywords, and very few special rules. If you are interested in game development (especially Roblox), Lua is an excellent starting point. For general programming, Python is more commonly recommended first.
How is Lua different from Python?
Lua is much smaller (the entire interpreter is under 300KB), starts up almost instantly, and is designed to be embedded inside other programs. Python has a vastly larger standard library and ecosystem. Lua uses tables for everything (arrays, dictionaries, objects), while Python has distinct list, dict, and class types.
What should I learn after Lua basics?
If you are using Lua for games, explore the LÖVE 2D framework for desktop games or dive deeper into Roblox Studio. For server scripting, look at OpenResty (Lua in Nginx). If you want to go deeper into the language, study metatables and the Lua C API for embedding.
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The Story of Lua
Real history, real companies, and an honest look at where Luashines and where it doesn't — not just a feature list.
Where it came from
Lua was created in Brazil in 1993 by Roberto Ierusalimschy, Luiz Henrique de Figueiredo and Waldemar Celes at PUC-Rio, designed from the outset to be small, fast, and easy to embed inside other applications written in C — rather than to be used as a stand-alone language on its own, which is a genuinely different design goal from most languages on this list.
How it’s actually used today
Lua is the scripting language behind Roblox — meaning millions of young developers have written their first lines of code in Lua without necessarily knowing it — and it's used for modding in games like World of Warcraft and Garry's Mod. Adobe Photoshop Lightroom and various network routers and embedded devices also use Lua internally for lightweight scripting.
Strengths & trade-offs
Lua's tiny footprint and speed make it ideal for embedding inside a larger application (a game engine, a piece of hardware) where you need scripting without the overhead of a full language runtime. It's not designed to be a general-purpose, stand-alone application language the way Python or JavaScript are, so you won't typically build a whole web app or CLI tool in it alone.
What to learn next
If your interest is specifically Roblox or game modding, Lua is genuinely enough on its own to get productive quickly. For general-purpose scripting beyond a specific game engine or embedded tool, Python or Bash cover far more ground.