What is the drop order in Rust

The Drop trait runs code when a value goes out of scope, executing in reverse order of creation (LIFO). Implement Drop by defining the drop method on your type to perform cleanup tasks like closing files or freeing resources.

use std::fmt::Debug;

struct MyResource;

impl Drop for MyResource {
    fn drop(&mut self) {
        println!("Cleaning up MyResource");
    }
}

fn main() {
    let _r = MyResource; // `drop` runs here when `_r` goes out of scope
}

The Drop trait is Rust's way of running cleanup code automatically when a variable is no longer needed. Think of it like a trash can that empties itself the moment you walk away from your desk. You use it to ensure resources like file handles or network connections are released immediately to prevent leaks.