let x = 10; x += 1; // 10 + 1 = 11 x -= 1; // 10 - 1 = 9 x *= 2; // 10 * 2 = 20 x /= 2; // 10 / 2 = 5 x %= 3; // 10 % 3 = 1 (returns the remainder of 10/3 = 1) x **= 3; // 10 ** 3 = 1000