Rust
Master Rust from the ground up. This course covers ownership and borrowing, structs, enums and pattern matching, control flow, functions, collections, and idiomatic error handling with Result and Option, through 12 hands-on lessons.
Start Learning →What is Rust?
Rust is a systems programming language originally created by Graydon Hoare, sponsored by Mozilla starting in 2009, and released as a stable 1.0 in May 2015. It is designed to give you the raw performance and low-level control of C and C++, but with memory safety and thread safety guaranteed at compile time — without needing a garbage collector.
Rust achieves this through its ownership and borrowing system: a set of compile-time rules, enforced by the "borrow checker," that ensure your program never has dangling pointers, data races, or use-after-free bugs, while still compiling down to fast, predictable native machine code.
Rust has topped Stack Overflow's "most loved programming language" survey for multiple years running — many developers who learn its ownership model never want to go back to manual memory management or a garbage collector.
Where is Rust Used?
Rust has grown from an experimental Mozilla project into a mainstream choice for performance-critical, safety-sensitive software across the industry. Here are the major application areas:
Browsers & Web Engines
Parts of Firefox's rendering engine (Stylo, from the Servo project) are written in Rust.
Cloud & Edge Infrastructure
Cloudflare and AWS rely heavily on Rust for performance-critical infrastructure, including AWS Firecracker microVMs.
Systems & OS Development
The Linux kernel accepts Rust code for writing drivers and modules alongside C.
Command-Line Tools
Fast, single-binary CLI tools like ripgrep, fd, and bat are written in Rust.
Blockchain & Cryptography
Projects like Solana and Polkadot use Rust for performance-critical, security-sensitive code.
WebAssembly
Rust compiles cleanly to WebAssembly, making it a top choice for high-performance code that runs in the browser.
Real-World Examples
Here are some practical applications you can build using Rust:
Example 1: CLI Tool
Build a fast command-line utility that parses arguments and processes files, compiled to a single dependency-free binary.
Example 2: Web API
Build a JSON REST API using a framework like Axum or Actix-web, backed by Rust's async ecosystem.
Example 3: Concurrent Data Processor
Process large datasets across multiple threads safely, with the compiler ruling out data races at compile time.
Example 4: Game or Simulation Engine
Rust's performance and safety make it a rising choice for game engines and real-time simulations.
Why Learn Rust?
Career
- Rust has topped Stack Overflow's "most loved language" survey for multiple years running
- High demand for systems, infrastructure, and performance-critical roles
- Growing adoption at companies like Microsoft, AWS, Google, and Meta
- A strong signal on a resume that you understand memory and performance deeply
Performance
- Compiles to native machine code with performance comparable to C and C++
- No garbage collector — memory is freed deterministically when values go out of scope
- Zero-cost abstractions mean high-level code doesn't sacrifice runtime speed
- Fine-grained control over memory layout when you need it
Safety
- The borrow checker eliminates use-after-free, double-free, and data races at compile time
- No null references — Option<T> forces you to handle absence explicitly
- Exhaustive match statements catch unhandled cases before your program ever ships
- "Fearless concurrency" — the compiler enforces thread safety, not just convention
Ecosystem
- Cargo bundles building, testing, dependency management, and docs into one tool
- crates.io hosts a large, high-quality package registry
- Excellent tooling — rust-analyzer, clippy, and rustfmt are best-in-class
- Backed by the Rust Foundation, with Google, Microsoft, AWS, Meta, and Huawei among its members
Code Example
Here is a small taste of what Rust looks like — a struct with an owned field and a method that borrows it, the kind of code you'll write constantly once ownership clicks:
struct Student { name: String, marks: f64,}
impl Student { fn grade(&self) -> &str { if self.marks >= 60.0 { "First Class" } else if self.marks >= 50.0 { "Second Class" } else { "Pass" } }}
fn main() { let student = Student { name: String::from("Rahul"), marks: 78.5, };
println!("{} scored {:.1} — {}", student.name, student.marks, student.grade());}Click Run to see what this code prints.
A struct with an owned String field, a method that borrows &self instead of taking ownership, and the kind of straightforward branching logic you'll write constantly in idiomatic Rust — no null checks, no manual memory management.
Course Curriculum
Follow these 12 lessons sequentially to build a solid, practical understanding of Rust.
Master variables and data types first, then take your time with ownership and borrowing — it is the single most important lesson in this course and everything after it builds on it. Understand structs and enums before control flow and functions, and complete collections before error handling, since Result and Option build directly on what you learn about enums.
Projects You'll Build
Apply your knowledge by building these real-world projects:
CLI Task Manager
Build a command-line to-do app that reads and writes tasks to a file, using structs and enums to model tasks and their status.
Command-Line Calculator
Parse and evaluate expressions from user input, using Result and the ? operator to handle invalid input gracefully.
📇 Contact Book
Store and search contacts using a HashMap, practicing ownership and borrowing as data moves between functions.
Simple REST API
Build a small JSON API that manages a list of resources in memory, applying everything from structs to error handling.
Frequently Asked Questions
The ownership model has a real learning curve, often called "fighting the borrow checker," but most developers report it clicking after a few weeks of regular practice — and Rust's compiler error messages are unusually clear and actionable.
No, but familiarity with basic programming concepts (variables, loops, functions) from any language will help you move faster. Prior C or C++ experience helps with pointer intuition but isn't required.
Yes. Frameworks like Axum, Actix-web, and Rocket, combined with the async ecosystem built around Tokio, make Rust a strong choice for high-performance web backends.
Rust offers comparable raw performance, but its borrow checker enforces memory and thread safety at compile time instead of leaving it entirely to programmer discipline.
Traits and generics, lifetimes in more depth, and then either async/await with Tokio or a specific domain — web backends, CLI tools, embedded systems, or WebAssembly — are natural next steps.
Key Takeaways & Summary
- Rust is a statically typed, compiled systems language focused on memory safety without a garbage collector.
- Its ownership and borrowing system enforces memory and thread safety entirely at compile time, with zero runtime cost.
- Rust has no null — Option<T> and Result<T, E> make absence and failure explicit, compiler-checked values instead.
- Rust powers major infrastructure at Mozilla, Cloudflare, AWS, and the Linux kernel.
- This 12-lesson course takes you from Rust fundamentals through ownership, structs, enums, collections, and error handling.
Begin with the Introduction lesson, complete each topic in order, and run every example yourself — ownership and borrowing click far faster once you've actually hit a borrow-checker error and fixed it, not just read about one.