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Learn Lua

A free, interactive online Lua course. You write Lua on every lesson, with AI hints when something nils out, and a free certificate when you finish.

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  • Beginner friendly
  • sparkles iconAI-assisted coding help
  • hint iconHands-on interactive lessons
  • volume On iconAudio narration on every lesson
  • quiz iconQuizzes to test your knowledge
  • certificate iconFree certificate of completion

Syllabus

3 sections6 projects214 lessons168 challenges1,069 quiz questions
  1. Section 1

    Fundamentals

    Start sectionStartExpandCollapse    The first section in Lua for absolute beginners.90 lessons74 challenges472 questions2 projects

    Introduction

    3 lessons316
    • 01The LanguageChallenge
    • 02Hello World!ChallengeQuiz
    • 03CommentsChallengeQuiz

    Variables and Data Types

    8 lessons754
    • 01What is a Variable?ChallengeQuiz
    • 02NumbersChallengeQuiz
    • 03StringsChallengeQuiz
    • 04BooleansChallengeQuiz
    • 05The Value 'nil'ChallengeQuiz
    • 06The type() FunctionChallengeQuiz
    • 07Naming ConventionsQuiz
    • 08Recap - Character ProfileChallenge

    Operators 1 Arithmetic & Conc

    6 lessons635
    • 01Arithmetic OperatorsChallengeQuiz
    • 02Modulo OperatorChallengeQuiz
    • 03Exponentiation OperatorChallengeQuiz
    • 04String ConcatenationChallengeQuiz
    • 05Operator PrecedenceChallengeQuiz
    • 06Recap - Simple CalculationsChallenge

    Operators 2 Relational & Logic

    8 lessons651
    • 01Equality OperatorsChallengeQuiz
    • 02Relational OperatorsChallengeQuiz
    • 03The 'and' OperatorChallengeQuiz
    • 04The 'or' OperatorChallengeQuiz
    • 05The 'not' OperatorChallengeQuiz
    • 06Short-Circuit EvaluationQuiz
    • 07Truthy and Falsy ValuesQuiz
    • 08Recap - Simple LogicChallenge

    Basic Output

    9 lessons954
    • 01Printing LiteralsChallengeQuiz
    • 02Printing VariablesChallengeQuiz
    • 03Printing Multiple ValuesChallengeQuiz
    • 04Combining Strings & VariablesChallengeQuiz
    • 05The tostring() FunctionChallengeQuiz
    • 06InputChallengeQuiz
    • 07CastChallengeQuiz
    • 08Recap - Status ReportChallenge
    • 09Recap - Till 120Challenge

    Project: Character Stats Disp

    Project5 lessons1
    • 01Welcome MessageChallenge
    • 02Declare Character StatsProject
    • 03Display Basic StatsProject
    • 04Add a Boolean FlagProject
    • 05Final SummaryProject

    Basic Conditional Logic

    4 lessons423
    • 01The if-then StatementChallengeQuiz
    • 02The if-then-else StatementChallengeQuiz
    • 03The elseif StatementChallengeQuiz
    • 04Recap - Treasure ChestChallenge

    String Manipulation Basics

    6 lessons637
    • 01string.len()ChallengeQuiz
    • 02string.upper & string.lowerChallengeQuiz
    • 03string.sub()ChallengeQuiz
    • 04string.rep()ChallengeQuiz
    • 05string.find()ChallengeQuiz
    • 06Recap - Format UsernameChallenge

    Functions Basics

    6 lessons636
    • 01Declaring a FunctionChallengeQuiz
    • 02Calling a FunctionChallengeQuiz
    • 03Functions with ParametersChallengeQuiz
    • 04Functions with Multiple ParamsChallengeQuiz
    • 05The 'return' StatementChallengeQuiz
    • 06Recap - Area CalculatorChallenge

    Tables Part 1: List-Style

    8 lessons752
    • 01What is a Table?Quiz
    • 02Creating a TableChallengeQuiz
    • 03Accessing Elements by IndexChallengeQuiz
    • 04Modifying Elements by IndexChallengeQuiz
    • 05The Length Operator '#'ChallengeQuiz
    • 06table.insert()ChallengeQuiz
    • 07table.remove()ChallengeQuiz
    • 08Recap - Manage Party MembersChallenge

    Tables 2: Dictionary-Style

    7 lessons648
    • 01Key-Value PairsQuiz
    • 02Creating Dictionary-Style TablChallengeQuiz
    • 03Accessing - Bracket NotationChallengeQuiz
    • 04Accessing with Dot NotationChallengeQuiz
    • 05Adding and Modifying PairsChallengeQuiz
    • 06Removing Pairs with nilChallengeQuiz
    • 07Recap - Item PropertiesChallenge

    Loops Basics

    6 lessons636
    • 01The while LoopChallengeQuiz
    • 02The repeat-until LoopChallengeQuiz
    • 03The Numeric for LoopChallengeQuiz
    • 04for Loop with a StepChallengeQuiz
    • 05The 'break' StatementChallengeQuiz
    • 06Recap - CountdownChallenge

    Project: Simple Potion Shop

    Project6 lessons1
    • 01Project SetupChallenge
    • 02Adding a PotionProject
    • 03Displaying the InventoryProject
    • 04Calculating Total Stock ValueProject
    • 05Finding a Specific PotionProject
    • 06Selling a PotionProject

    Variable Scope

    5 lessons330
    • 01Global VariablesQuiz
    • 02Local VariablesChallengeQuiz
    • 03Why Use Local Variables?Quiz
    • 04Scope and BlocksChallengeQuiz
    • 05Recap - Scope PuzzleChallenge

    Final Challenges

    3 lessons3
    • 01Recap - Player TurnChallenge
    • 02Recap - Simple DatabaseChallenge
    • 03Recap - Sum of Even NumbersChallenge
  2. Section 2

    Logic & Flow

    Start sectionStartExpandCollapse    Develop problem-solving skills and create dynamic, interactive programs54 lessons36 challenges244 questions2 projects

    Advanced Table Iteration

    4 lessons423
    • 01Iterating with pairs()ChallengeQuiz
    • 02Iterating with ipairs()ChallengeQuiz
    • 03pairs() vs. ipairs()ChallengeQuiz
    • 04Recap - Character SheetChallenge

    More Table Library Functions

    5 lessons430
    • 01table.concat()ChallengeQuiz
    • 02table construction & unpack()ChallengeQuiz
    • 03table.sort()ChallengeQuiz
    • 04Custom Sorting with FunctionsQuiz
    • 05Recap - High Score BoardChallenge

    Advanced Function Concepts

    6 lessons539
    • 01Returning Multiple ValuesQuiz
    • 02Variadic Functions (...)ChallengeQuiz
    • 03Functions First-Class ValuesChallengeQuiz
    • 04Anonymous FunctionsChallengeQuiz
    • 05What is a Closure?ChallengeQuiz
    • 06Recap - Simple Event HandlerChallenge

    Introduction to Metatables

    8 lessons757
    • 01What is a Metatable?Quiz
    • 02setmetatable & getmetatableChallengeQuiz
    • 03The __index MetamethodChallengeQuiz
    • 04The __newindex MetamethodChallengeQuiz
    • 05The __tostring MetamethodChallengeQuiz
    • 06Arithmetic Metamethods Part 1ChallengeQuiz
    • 07Arithmetic Metamethods Part 2ChallengeQuiz
    • 08Recap - Read-Only TableChallenge

    Project: Text Adventure Engine

    Project8 lessons1
    • 01Project Setup: The RoomChallenge
    • 02Linking RoomsProject
    • 03Player StateProject
    • 04The Game LoopProject
    • 05Handling User InputProject
    • 06Moving the PlayerProject
    • 07Handling Invalid MovesProject
    • 08Displaying ExitsProject

    Error Handling

    3 lessons216
    • 01The error() FunctionQuiz
    • 02Protected Calls with pcall()ChallengeQuiz
    • 03Recap - Safe DivisionChallenge

    Advanced String Manipulation

    6 lessons641
    • 01string.gsub() for SubstitutionChallengeQuiz
    • 02Intro to String PatternsChallengeQuiz
    • 03string.find()ChallengeQuiz
    • 04string.match()ChallengeQuiz
    • 05Iterating with string.gmatch()ChallengeQuiz
    • 06Recap - Log File ParserChallenge

    Project: Contact List

    Project7 lessons1
    • 01Project SetupChallenge
    • 02The Main LoopProject
    • 03Adding a ContactProject
    • 04Listing All ContactsProject
    • 05Searching for a ContactProject
    • 06Deleting a ContactProject
    • 07Handling Invalid InputProject

    Coroutines for Beginners

    7 lessons638
    • 01What is a Coroutine?Quiz
    • 02coroutine create & resumeChallengeQuiz
    • 03Pausing with coroutine.yield()ChallengeQuiz
    • 04resume & yieldChallengeQuiz
    • 05Checking Coroutine StatusChallengeQuiz
    • 06Recap - Number GeneratorChallenge
    • 07Recap - Vector MathChallenge
  3. Section 3

    Object Oriented Programming

    Start sectionStartExpandCollapse    Discover how to organize code with classes, objects, and reusable structures70 lessons58 challenges353 questions2 projects

    The 'Self' Concept

    5 lessons532
    • 01Tables with FunctionsChallengeQuiz
    • 02Explicit 'self'ChallengeQuiz
    • 03The Colon SyntaxChallengeQuiz
    • 04Dot vs ColonChallengeQuiz
    • 05Recap - Moving PointChallenge

    Class Prototype Pattern

    6 lessons641
    • 01The Prototype ConceptChallengeQuiz
    • 02Linking with __indexChallengeQuiz
    • 03The :new() ConstructorChallengeQuiz
    • 04Initializing AttributesChallengeQuiz
    • 05Independent InstancesChallengeQuiz
    • 06Recap - Car FactoryChallenge

    Object State and Behavior

    7 lessons748
    • 01Instance VariablesChallengeQuiz
    • 02Getter MethodsChallengeQuiz
    • 03Setter MethodsChallengeQuiz
    • 04Calculated PropertiesChallengeQuiz
    • 05Formatting StringsChallengeQuiz
    • 06Equality ChecksChallengeQuiz
    • 07Recap - Student GradeChallenge

    Project: Digital Bank

    Project7 lessons1
    • 01Project SetupChallenge
    • 02Deposit MethodProject
    • 03Withdraw MethodProject
    • 04Get BalanceProject
    • 05Account InfoProject
    • 06Transfer FundsProject
    • 07Final Bank TestProject

    Operator Overloading in OOP

    5 lessons531
    • 01Adding ObjectsChallengeQuiz
    • 02Subtracting ObjectsChallengeQuiz
    • 03Concatenating ObjectsChallengeQuiz
    • 04Comparing Objects (<, >)ChallengeQuiz
    • 05Recap - Wallet MathChallenge

    Inheritance Basics

    6 lessons643
    • 01The Inheritance SetupChallengeQuiz
    • 02Inheriting MethodsChallengeQuiz
    • 03Extending the ConstructorChallengeQuiz
    • 04Adding Child MethodsChallengeQuiz
    • 05Shared vs UniqueChallengeQuiz
    • 06Recap - Shape HierarchyChallenge

    Polymorphism & Overriding

    6 lessons640
    • 01Overriding MethodsChallengeQuiz
    • 02Calling Parent MethodsChallengeQuiz
    • 03Duck TypingChallengeQuiz
    • 04Common InterfaceChallengeQuiz
    • 05Checking TypeChallengeQuiz
    • 06Recap - Employee RolesChallenge

    Encapsulation

    6 lessons644
    • 01Naming ConventionsChallengeQuiz
    • 02Closures for PrivacyChallengeQuiz
    • 03Access via ClosuresChallengeQuiz
    • 04Read-Only TablesChallengeQuiz
    • 05Validation LogicChallengeQuiz
    • 06Recap - Secure VaultChallenge

    Composition & Mixins

    6 lessons642
    • 01Has-A RelationshipChallengeQuiz
    • 02DelegationChallengeQuiz
    • 03Simple MixinsChallengeQuiz
    • 04Applying Multiple MixinsChallengeQuiz
    • 05Mixins vs InheritanceChallengeQuiz
    • 06Recap - Robot AssemblyChallenge

    Project: Shape Manager

    Project7 lessons1
    • 01Project SetupChallenge
    • 02Rectangle ClassProject
    • 03Circle ClassProject
    • 04Perimeter MethodProject
    • 05Shape CollectionProject
    • 06Total AreaProject
    • 07Filter ShapesProject

    Design Patterns (Lite)

    5 lessons532
    • 01Factory FunctionsChallengeQuiz
    • 02Singleton TableChallengeQuiz
    • 03Iterator PatternChallengeQuiz
    • 04Observer (Listener)ChallengeQuiz
    • 05Recap - Logger FactoryChallenge

    Final Challenges

    4 lessons4
    • 01Recap - Inventory SystemChallenge
    • 02Recap - User ManagerChallenge
    • 03Recap - Score TrackerChallenge
    • 04Final OOP CheckChallenge

Lua courses

Hands-on Lua courses, free to start in your browser.

Data Structures

Beginner Challenges - Practice Basic Concepts

Popular

Put your beginner coding knowledge to test and try to solve this programming challenges, use any language you want, Happy Coding!

certificate icon

Certificate on completion

  • 20
  • 20

Coding Problems

Popular

Put your programming problem solving skills to the test using the exercises with different difficulties in this course. Designed for coders with some prior knowledge of the basic syntax in any programming language.

certificate icon

Certificate on completion

  • 32
  • 31

Heaps & Priority Queues - Data Structures Series #7

New

In this course, you will learn about the Heap data structure (the backbone of priority queues), create a MinHeap from zero using your preferred language, and practice coding challenges with it!

Data Structures
certificate icon

Certificate on completion

  • 14
  • 6
  • 1

Coding Problems: Volume 2

Put your programming problem solving skills to the test using the exercises with different difficulties in this course. Designed for coders with some prior knowledge of the basic syntax in any programming language. This course is an extension of the first Coding Problems

certificate icon

Certificate on completion

  • 25
  • 24

Star Pattern Bootcamp

Put your programming problem solving skills to learn how to print star patterns range from simple to complex, involving different levels of nested loops, conditional statements, and mathematical calculations.

  • 30
  • 28

Stack - Data Structures Series #1

In this course, you will learn about the Stack data structure, create a Stack from zero using your preferred language, and practice coding challenges with it!

Data Structures
  • 13
  • 6
  • 1
See all 27 Lua courses →

Why learn Lua with Coddy

  • Run real Lua code in your browser. No Lua interpreter to install, no toolchain setup. Each lesson runs your Lua script server-side and shows the output instantly.
  • Lua as it's actually used: variables, control flow, functions, tables (Lua's one true data structure), string manipulation, metatables and OOP patterns, error handling. The Lua foundations you need for Roblox, Love2D, or embedded scripting.
  • AI hints help you debug Lua scripts and read errors without spoiling the answer, so common stumbles like nil indexing and 1-based arrays become learning moments.
  • Free Lua certificate when you finish the course. A credible signal alongside Roblox games, mods, or embedded scripting projects you've built.

Frequently asked questions about learning Lua

What is Lua used for?

Lua is mainly used as an embedded scripting language inside larger applications, especially game engines. Roblox scripting (Luau is a Roblox-specific dialect of Lua), Love2D, World of Warcraft addons, Defold, and Garry's Mod all use Lua. Outside games, Lua is also used for configuration, automation, and embedded systems.

Is Lua easy to learn?

Lua is one of the smaller, simpler programming languages - the entire reference manual fits in a short PDF, and there's basically one main data structure (the table). Most beginners reach their first working Lua program within the first hour. The trickier parts (metatables, closures, coroutines) come later and are introduced gradually.

Should I learn Lua for Roblox?

Yes. Lua (specifically the Luau dialect Roblox uses) is the only scripting language for Roblox games. The Lua course covers the same core language Luau is based on (variables, tables, functions, metatables, OOP patterns), so finishing it gives you a real head start on Roblox scripting.

How long does it take to learn Lua?

Lua basics - variables, conditionals, loops, functions, tables - take one to two weeks of daily practice. Becoming comfortable with metatables, closures, and OOP-in-Lua patterns usually takes another two to four weeks. From there, applying Lua inside Roblox or another game engine is its own learning curve on top of the language.

Can I learn Lua online for free?

Yes. The interactive Lua course is free - lessons, coding exercises, quizzes, and a certificate. Lua runs server-side, so you don't need to install Lua or any game engine locally to start writing code.

Do I get a certificate after the Lua course?

Yes. Finishing the Lua course gives you a free certificate of completion you can add to your resume or share on LinkedIn alongside any Roblox games, mods, or scripting projects you've built.
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