Lifetimes in RUST

 Lifetimes in RUST

Lifetimes are a way to ensure that references in Rust are always valid. They describe the scope of a reference and ensure that it doesn't outlive the value it refers to. Here's an example:

rust

fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {

    if x.len() > y.len() {

        x

    } else {

        y

    }

}

fn main() {

    let s1 = String::from("hello");

    let s2 = String::from("world");

    let result = longest(&s1, &s2);

    println!("The longest string is {}", result);

}