Rust is a programming language that gives you the speed of C++ with safety guarantees built into the compiler. It is famous for two things: programs written in Rust are fast, and the compiler refuses to build code with whole classes of memory bugs — the kind that cause crashes and security flaws in other systems languages. That combination is why Rust now powers parts of browsers, operating systems, and developer tools.

How does Rust work? Every value in Rust has one owner, and the compiler tracks ownership at compile time. When you pass a value somewhere, ownership moves or is borrowed, and the compiler checks that no two parts of your code can mutate the same data unsafely at the same time. This idea is called the borrow checker, and it is the part beginners find hardest — but it is also the part that catches bugs before your program ever runs.…