fn main() {
let mut x = 10;
println!("Start: {}", x);
x += 5;
println!("After += 5: {}", x);
x -= 2;
println!("After -= 2: {}", x);
x *= 2;
println!("After *= 2: {}", x);
x /= 3;
println!("After /= 3: {}", x);
x %= 4;
println!("After %= 4: {}", x);
}