Creating vector in rust.

let mut v = Vec::new();

    v.push(5);
    v.push(6);
    v.push(7);
    v.push(8);
println!("{:?}", v)

[5, 6, 7, 8]

Reading Elements of Vectors

let v = vec![1, 2, 3, 4, 5];

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

    let third: Option<&i32> = v.get(2);
    match third {
        Some(third) => println!("The third element is {third}"),
        None => println!("There is no third element."),
    }

println!("{:?}", v)

The third element is 3
The third element is 3
[1, 2, 3, 4, 5]

Option<T> is an enum that represents the presence or absence of a value. It is a fundamental type in Rust’s approach to handling nullable values and potential errors, promoting explicit handling rather than implicit null pointers found in other languages.