Journey
Learn Rust
A free, interactive online Rust course. You write Rust on every lesson — syntax, ownership and borrowing, lifetimes, traits, pattern matching — with AI hints when the borrow checker pushes back, and a free certificate when you finish.
16,687+ codders enrolled
- Beginner friendly
AI-assisted coding help
Hands-on interactive lessons
Audio narration on every lesson
Quizzes to test your knowledge
Free certificate of completion
Syllabus
Section 1
Fundamentals
Start sectionStartExpandCollapseBuild a strong foundation with essential concepts and basic skillsIntroduction
4 lessons324- 01RustChallenge
- 02Hello World!ChallengeQuiz
- 03CommentsQuiz
- 04Basic Program StructureChallengeQuiz
Variables Part 1
5 lessons539- 01NumbersChallengeQuiz
- 02CharChallengeQuiz
- 03 StringChallengeQuiz
- 04BooleanChallengeQuiz
- 05Mutable Variables ChallengeQuiz
Variables Part 2
5 lessons433- 01Type DeclarationChallengeQuiz
- 02Naming ConventionsQuiz
- 03Type InferenceChallengeQuiz
- 04Recap - Initialize VariablesChallenge
- 05Type CastingChallengeQuiz
Operators Part 1
5 lessons438- 01Arithmetic OperatorsChallengeQuiz
- 02Modulo OperatorChallengeQuiz
- 03Arithmetic ShortcutsChallengeQuiz
- 04Comparison OperatorsChallengeQuiz
- 05String ComparisonQuiz
Operators Part 2
4 lessons424- 01Logical Operators Part 1ChallengeQuiz
- 02Logical Operators Part 2ChallengeQuiz
- 03Recap - Simple LogicChallenge
- 04Logical Operators Part 3ChallengeQuiz
Decision Making
5 lessons532- 01If ExpressionsChallengeQuiz
- 02If-ElseChallengeQuiz
- 03Match StatementChallengeQuiz
- 04Recap - If ElseChallenge
- 05Nested If - ElseChallengeQuiz
Basic IO
4 lessons417- 01Printing to ConsoleChallengeQuiz
- 02Reading User InputChallengeQuiz
- 03Recap - Till 120Challenge
- 04Recap - True or FalseChallenge
Calculator App
Project4 lessons1- 01Welcome MessageChallenge
- 02Getting NumbersProject
- 03Basic OperationsProject
- 04Formatted OutputProject
Loops
8 lessons851- 01For Over SeriesChallengeQuiz
- 02While LoopChallengeQuiz
- 03BreakChallengeQuiz
- 04ContinueChallengeQuiz
- 05Nested LoopChallengeQuiz
- 06Loop LabelsChallengeQuiz
- 07Infinite LoopChallengeQuiz
- 08Recap - Dynamic InputChallenge
Variable Bindings
4 lessons230- 01ScopeQuiz
- 02Shadowing Part 1ChallengeQuiz
- 03Variable BindingQuiz
- 04Shadowing Part 2ChallengeQuiz
Functions
6 lessons634- 01Declaring FunctionsChallengeQuiz
- 02Parameters and ArgumentsChallengeQuiz
- 03Return ValuesChallengeQuiz
- 04Multiple Return ValuesChallengeQuiz
- 05Recap - Sigma FunctionChallenge
- 06Recap - Validation FunctionChallenge
Arrays Basics
5 lessons430- 01Declaring ArraysChallengeQuiz
- 02Array as ParameterQuiz
- 03Accessing ElementsChallengeQuiz
- 04Modifying ArraysChallengeQuiz
- 05Recap - Pretty Print ArrayChallenge
Arrays Continued
5 lessons423- 01Mutable Reference ArraysChallengeQuiz
- 02Array MethodsChallengeQuiz
- 03Recap - Product ArrayChallenge
- 04Recap - Reversed ArrayChallenge
- 05Better PrintQuiz
Iterating Over Arrays
4 lessons333- 01Range GuideChallengeQuiz
- 02Enhanced For LoopChallengeQuiz
- 03Borrow In LoopQuiz
- 04Common Array OperationsChallengeQuiz
String Operations
4 lessons424- 01String MethodsChallengeQuiz
- 02format! MacroChallengeQuiz
- 03String ConversionChallengeQuiz
- 04Recap - FormatChallenge
Final Projects
3 lessons37- 01Number PatternChallengeQuiz
- 02Pattern FinderChallenge
- 03Student Grade CalculatorChallenge
Section 2
Logic & Flow
Start sectionStartExpandCollapseDevelop problem-solving skills and create dynamic, interactive programsAdvanced Control Flow
6 lessons640- 01The 'match' ExpressionChallengeQuiz
- 02Matching Multiple ValuesChallengeQuiz
- 03Matching RangesChallengeQuiz
- 04The 'if let' ExpressionChallengeQuiz
- 05Loops as ExpressionsChallengeQuiz
- 06Recap - Simple Command ParserChallenge
Introduction to Vectors
8 lessons756- 01What is a Vector?Quiz
- 02Creating a VectorChallengeQuiz
- 03Adding Elements with pushChallengeQuiz
- 04Accessing Vector ElementsChallengeQuiz
- 05Iterating Over a VectorChallengeQuiz
- 06Mutable IterationChallengeQuiz
- 07Removing ElementsChallengeQuiz
- 08Recap - Basic Score TrackerChallenge
Command-Line To-Do List
5 lessons5- 01Project SetupChallenge
- 02Adding a TaskChallenge
- 03Viewing All TasksChallenge
- 04Removing a TaskChallenge
- 05Final CodeChallenge
Grouping Data with Structs
7 lessons650- 01What is a Struct?Quiz
- 02Structs OverviewChallengeQuiz
- 03Accessing Struct FieldsChallengeQuiz
- 04Mutable StructsChallengeQuiz
- 05Structs as Function ParametersChallengeQuiz
- 06Tuple StructsChallengeQuiz
- 07Recap - Create a Book StructChallenge
Key-Value Pairs with Hash Maps
8 lessons653- 01What is a Hash Map?Quiz
- 02Creating a Hash MapQuiz
- 03Inserting Key-Value PairsChallengeQuiz
- 04Accessing ValuesChallengeQuiz
- 05Iterating Over a Hash MapChallengeQuiz
- 06Updating a ValueChallengeQuiz
- 07Removing a PairChallengeQuiz
- 08Recap - Word CounterChallenge
Handling Absence with 'Option'
7 lessons645- 01What is an 'Option'?Quiz
- 02Using 'match' with 'Option'ChallengeQuiz
- 03is_some() and is_none()ChallengeQuiz
- 04Unwrapping an 'Option'ChallengeQuiz
- 05The expectChallengeQuiz
- 06Providing a Default: unwrap_orChallengeQuiz
- 07Recap - Find an ElementChallenge
Handling Errors with 'Result'
7 lessons648- 01What is a 'Result'?Quiz
- 02Using 'match' with 'Result'ChallengeQuiz
- 03is_ok() and is_err()ChallengeQuiz
- 04Shortcuts: unwrap and expectChallengeQuiz
- 05The Question Mark Operator '?'ChallengeQuiz
- 06Parsing Strings to NumbersChallengeQuiz
- 07Recap - Safe Division FunctionChallenge
Project: Simple Item Inventory
5 lessons5- 01Project SetupChallenge
- 02Adding an ItemChallenge
- 03Checking StockChallenge
- 04Selling an ItemChallenge
- 05Putting it all togetherChallenge
String Slices and More
5 lessons432- 01String vs. &strQuiz
- 02Creating String SlicesChallengeQuiz
- 03Slices as Function ParametersChallengeQuiz
- 04Other SlicesChallengeQuiz
- 05Recap - Find First WordChallenge
Closures & Anonymous Functions
5 lessons431- 01What is a Closure?Quiz
- 02Defining a Simple ClosureChallengeQuiz
- 03Closures with ParametersChallengeQuiz
- 04Capturing the EnvironmentChallengeQuiz
- 05Recap - Simple Adder ClosureChallenge
Final Challenges
3 lessons3- 01Recap - Unique ItemsChallenge
- 02Recap - User Profile ValidatorChallenge
- 03Recap - Grade SummarizerChallenge
Section 3
Object Oriented Programming
Start sectionStartExpandCollapseDiscover how to organize code with classes, objects, and reusable structuresMethods and Behavior
7 lessons748- 01Intro Implementation BlocksChallengeQuiz
- 02The Self ParameterChallengeQuiz
- 03Mutable MethodsChallengeQuiz
- 04Associated FunctionsChallengeQuiz
- 05Multiple Implementation BlocksChallengeQuiz
- 06Method ChainingChallengeQuiz
- 07Recap - Rectangle ActionsChallenge
Encapsulation and Modules
6 lessons543- 01Modules BasicsQuiz
- 02The Public KeywordChallengeQuiz
- 03Private FieldsChallengeQuiz
- 04GettersChallengeQuiz
- 05SettersChallengeQuiz
- 06Recap - Secure LockerChallenge
Advanced Enums
5 lessons535- 01Enums with DataChallengeQuiz
- 02Methods on EnumsChallengeQuiz
- 03Matching Data VariantsChallengeQuiz
- 04The Option Enum RevisitedChallengeQuiz
- 05Recap - Shape EnumChallenge
Project: Virtual Pet
Project5 lessons1- 01Defining the PetChallenge
- 02Feeding the PetProject
- 03Playing with the PetProject
- 04Status ReportProject
- 05Final InteractionProject
Generics
5 lessons533- 01Generic StructsChallengeQuiz
- 02Generic MethodsChallengeQuiz
- 03Multiple Generic TypesChallengeQuiz
- 04Generic FunctionsChallengeQuiz
- 05Recap - Coordinate PointChallenge
Traits Definition
6 lessons641- 01What is a Trait?ChallengeQuiz
- 02Implementing TraitsChallengeQuiz
- 03Default ImplementationsChallengeQuiz
- 04Overriding DefaultsChallengeQuiz
- 05Traits with ParametersChallengeQuiz
- 06Recap - Media PlayerChallenge
Standard Traits
5 lessons536- 01The Debug TraitChallengeQuiz
- 02The Display TraitChallengeQuiz
- 03Clone and CopyChallengeQuiz
- 04Equality TraitsChallengeQuiz
- 05Recap - Printable PointChallenge
Traits as Bounds
5 lessons534- 01Trait Bounds SyntaxChallengeQuiz
- 02Multiple BoundsChallengeQuiz
- 03The Where ClauseChallengeQuiz
- 04Returning Types with TraitsChallengeQuiz
- 05Recap - Generic PrinterChallenge
Trait Objects
4 lessons425- 01Dynamic DispatchChallengeQuiz
- 02Vectors of TraitsChallengeQuiz
- 03Iterating Trait ObjectsChallengeQuiz
- 04Recap - Zoo ManagerChallenge
Project: Document System
Project5 lessons1- 01The Draw TraitChallenge
- 02Text ComponentProject
- 03Button ComponentProject
- 04The Screen StructProject
- 05Running the ScreenProject
Design Patterns in Rust
5 lessons531- 01Newtype PatternChallengeQuiz
- 02CompositionChallengeQuiz
- 03The Drop TraitChallengeQuiz
- 04From and IntoChallengeQuiz
- 05Recap - Smart Pointer MockChallenge
Final Challenges
3 lessons3- 01Generic StackChallenge
- 02Library CatalogChallenge
- 03Shape Area CalculatorChallenge
Why learn Rust with Coddy
- Write and run real Rust code in your browser. No rustup install, no Cargo setup. Each lesson compiles your Rust program server-side and shows the output (and any compiler errors) instantly.
- What makes Rust unique: ownership, borrowing, lifetimes, traits, enums and pattern matching, error handling with
Result. The Rust foundations every systems programmer needs. - AI hints walk you through Rust's famously strict compiler errors, so the borrow checker becomes a teacher instead of a wall when you're getting started.
- Free Rust certificate when you finish the course. A credible signal for systems, infrastructure, blockchain, and embedded roles where Rust is increasingly the language of choice.
Frequently asked questions about learning Rust
Is Rust hard to learn?
Rust has a reputation for being hard, mostly because of ownership and the borrow checker — concepts most other languages don't expose. The flip side is that the compiler catches a huge class of bugs at build time. The course introduces ownership and borrowing gradually, with small exercises that turn the borrow checker from a wall into a teacher.
What is Rust used for?
Systems programming, infrastructure (parts of the Linux kernel, Cloudflare, Discord, Dropbox), command-line tooling, embedded work, WebAssembly, and a growing chunk of blockchain and crypto code. It targets the same niches as C and C++ but with much stronger safety guarantees.
How long does it take to learn Rust?
Rust basics — syntax, control flow, functions, structs, enums — take two to four weeks of daily practice. Becoming comfortable with ownership, borrowing, lifetimes, and traits usually takes another two to six months. Mastery (advanced lifetimes, async, unsafe Rust) is a longer arc and best driven by real projects.
Should I learn Rust or Go?
Both are modern, statically-typed languages aimed at servers and infrastructure, but they trade off differently. Go optimizes for fast compile times, simple concurrency, and small spec — easier to pick up. Rust optimizes for performance and memory safety without a garbage collector — harder to learn but goes lower-level. Pick Go for backends and cloud tooling; pick Rust for systems work, performance-critical code, or anything that used to be C/C++.
Can I learn Rust online for free?
Yes. The interactive Rust course is free — full lessons, coding exercises, quizzes, and a certificate. Rust compiles server-side, so you don't need to install rustup or Cargo locally to get started writing real Rust.
Do I get a certificate after the Rust course?
Yes. Finishing the Rust course gives you a free certificate of completion. A verifiable signal you can add to your resume or share on LinkedIn alongside any Rust projects, CLI tools, or open-source contributions you've built.
