Lesson 1 / 25
Why Rust
Safety without a garbage collector.
Memory safety at compile time
Rust is a systems programming language that prevents whole classes of bugs (use-after-free, data races, null pointer dereferences, buffer overflows in safe code) at compile time, without a garbage collector. Its ownership system tracks who is responsible for each value, so memory is freed predictably. The result is performance comparable to C and C++ with far fewer security vulnerabilities, which is why Rust is used in browsers, operating systems, cloud infrastructure, command-line tools and WebAssembly. The cost is a learning curve: the compiler is strict, but its error messages are unusually helpful.
Fast, safe, productive
Rust gives C-like performance with memory safety checked at compile time.
A strict but helpful editor
Rust's compiler is like an editor who refuses to publish a manuscript with errors but tells you exactly which sentence is wrong and how to fix it.
Read the whole error message
Rust errors usually explain the problem and suggest a fix; reading them carefully is the fastest way to learn.
Quick check: How does Rust achieve memory safety?
- Manual malloc and free only
- A garbage collector running at runtime
- Ownership and borrowing rules checked at compile time
- Running everything in a virtual machine
Answer
Ownership and borrowing rules checked at compile time — Safety without runtime cost.