Appending Item to Vec in Rust

We can add elements to the end of a Vec using the .push() method.

.push() takes one parameter and "pushes" it onto the end of the Vec:

let mut arr1: Vec<i32> = vec![1, 2, 3];
arr1.push(4);

// arr1 is now [1, 2, 3, 4]

Assignment
Follow the Coding Tutorial and let's play with some arrays.

Hint
Look at the examples above if you get stuck.