How to print a Vec?

Question

I tried the following code:

fn main() {
    let v2 = vec![1; 10];
    println!(\"{}\", v2);
}

But the compiler complains:

Answer 1

Does anyone implement this trait for Vec?

Yes, here's how I did it

fn main() {
    let a = vec![10,12,13];
    println!("{:?}",display(a));
}


use std::fmt::Debug;
fn display(a: Vec) -> Vec {
    let mut new_vec : Vec = Vec::new();
    
    for i in a {
        new_vec.push(i);
    }
    return new_vec
}