Change tuple (mutable)

---

• Use the mut keyword to make the values of the tuple mutable.
• We still cannot add elements to the tuple. It's shape and the types of the fields are fixed.
• Assign a new value to one of the elements using the dot-notation.

examples/tuples/change-tuple/src/main.rs

fn main() {
    let mut row = ("Blue", 300, 3.67);
    println!("{:?}", row);
    row.0 = "Green";

    row.1 = 99;

    println!("{:?}", row);
}

("Blue", 300, 3.67)
("Green", 99, 3.67)