Borrow String when passing to a function

---

• When passing the variable we need to prefix it with &.
• In the function definition we also include the & in-front of the type.
• Inside the function we can prefix it with * to dereference the variable but in general we don't need to as Rust figures that out.

examples/ownership/string-function-borrow/src/main.rs

fn main() {
    let name = String::from("Foo Bar");
    println!("{name}");
    greet(&name);
    println!("{name}");
}

fn greet(text: &String) {
    println!("Greet: {}", *text); // explicit derefernce
    println!("Greet: {}", text); // automatic dereference
    println!("Greet: {text}");
}

Foo Bar
Greet: Foo Bar
Greet: Foo Bar
Greet: Foo Bar
Foo Bar