fn main() {
let x = 5u;
let y = {
let x_squared = x * x;
let x_cube = x_squared * x;
// This expression will be assigned to `y`
x_cube + x_squared + x
};
let z = {
// The semicolon suppresses this expression and `()` is assigned to `z`
2 * x;
};
println!("x is {}", x);
println!("y is {}", y);
println!("z is {}", z);
}