Alternatively, we could create an iterator using the iter method

• iter

fn main() {
    let numbers = vec![1, 2, 3];

    println!("{:?}", numbers);
    for n in numbers.iter() {
        println!("{}", n);
    }
    println!("{:?}", numbers);
}

[1, 2, 3]
1
2
3
[1, 2, 3]