cargo run

cargo run

Borrow - temporarily use a value without taking ownership - Creates a reference (either mutable or immutable) - Doesn't move ownership - Immutable ref

When to use String vs &str (string slice): - Use `String` when you need ownership or mutability. - Use `&str` for read-only string or string literals.

main() is the entry point of Rust program

Scalar types represent a single value

Simulates an async task that completes after `dt` milliseconds

Sequential

Associated functions - static methods

Elision - Rust figures out the lifetime

Function returning no value implicitly returns the unit type `()`

Multiple lifetime

Equivalent to `no_return`, but explicitly returning the unit type