fn lesson_two() {
let i1: u8 = 10;
let i2: i8 = -20;
let p1: usize = 1;
let p2: isize = 2;
let s1: &str = "hello";
let s2: String = String::from("hello");
let a1: [i32; 5] = [1, 2, 3, 4, 5];
let i1: Option<&i32> = a1.last();
let t1 = (1,2, 3);
let t2 = (5, 5.0, "5");
let unit = ();
type Age = u8;
let a1: Age = 57;
}