Ultimate Rust Crash Course |verified| -

Ownership & Borrowing. The compiler checks memory rules at compile time. No GC, no runtime overhead. If it compiles, it’s memory-safe. Mental model: Think of Rust as C++ with a very strict, helpful compiler that refuses to let you shoot yourself in the foot. 2. Installation & "Hello, World!" Install via rustup.rs . Then:

let s = String::from("hello world"); let hello = &s[0..5]; // type: &str let world = &s[6..11]; String literals are &str (immutable slices). struct User active: bool, username: String, sign_in_count: u64, ultimate rust crash course

pub trait Summary fn summarize(&self) -> String; Ownership & Borrowing

Immutability prevents accidental changes across large codebases. It’s your friend. Constants const MAX_POINTS: u32 = 100_000; // always immutable, type required. 4. Shadowing (Not Mutation) You can redeclare a variable name: If it compiles, it’s memory-safe

cargo new hello_rust cd hello_rust cargo run Inside src/main.rs :