// I AM NOT DONE

const NUMBER = 3;

const NUMBER: usize = 3;

// I AM NOT DONE

    number = 3;

    let number = 3;

// I AM NOT DONE

    let x: i32;

    let x: i32 = 0;

// I AM NOT DONE

    let x = 3;

    let mut x = 3;

// I AM NOT DONE

    let x;

    let x = 0;

// I AM NOT DONE

    x = 5;

    let x = 5;