rust/theBook/chapter-8-common-collections/vector/src/main.rs


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fn main() {
    let mut v = vec![1,2,3,4,5];

    let op: &i32 = &v[2];
    println!("The third element is {op}");

    let op: Option<&i32> = v.get(2);
    match op {
        Some(i) => println!("this is {i}"),
        None    => println!("this isn't"),
    }
    
   v.push(6);

    for i in &mut v {
        *i += 50;
        println!("{i}");
    }

}