arrays, vectors and slices

rust/book/src/main.rs

    string.push_str(" (again...)");
    println!("{}", string);
    // arrays
    let array: [i32; 3] = [1, 2, 3];
    println!("You have {} numbers:", array.len());
    for n in array.iter() {
        println!("{}", n);
    }
    // vectors
    let mut vec: Vec<i32> = vec![4, 5, 6];
    vec.push(7);
    println!("You have {} more numbers:", vec.len());
    for n in vec.iter() {
        println!("{}", n);
    }
    // slices
    let middle = &vec[1..3];
    println!("Only a few of those:");
    for n in middle.iter() {
        println!("{}", n);
    }
}