// Created on savesnippets.com · https://savesnippets.com/ulYwl8YhvkSmIA
fn takes_ownership(s: String) {
    println!("owned: {s}");
} // s is dropped here

fn borrows(s: &String) {
    println!("borrowed: {s}");
} // s is NOT dropped — caller still owns it

fn borrows_mut(s: &mut String) {
    s.push_str(" — modified");
}

fn main() {
    let mut s = String::from("hello");

    borrows(&s);              // OK — many immutable borrows allowed
    borrows(&s);              // OK

    borrows_mut(&mut s);      // mutable borrow — only one at a time
    println!("{s}");          // "hello — modified"

    takes_ownership(s);       // moves s
    // println!("{s}");       // ❌ compile error: s was moved
}