How to print the contents of a vector (Vec) in Rust?

Hello! I just started learning Rust, and I have a problem with printing a vector. I'm writing a small program that collects numbers into a vector, and then I want to simply see what's inside. But when I try to use println! with the vector, the compiler complains. Here's my code: ```rust fn main() { let numbers = vec![1, 2, 3, 4, 5]; println!("My vector: {}", numbers); } ``` And I get this error: ``` error[E0277]: `Vec` doesn't implement `Display` ``` What does this mean? I thought I could just put a variable in curly braces, like in Python or JavaScript. Why doesn't Rust want to print the vector? How do I properly print its contents? I need to see all the elements of the vector to debug my program. I tried writing `{:?}` instead of `{}`, but then it outputs