I booked 10 day, stayed in the hotel for 6 days, and checked out.

If you choose to stay for 10 days when booking a hotel, but decide to check out after 6 days, you need to check out according to the hotel policy.

Usually the check-out time of the hotel is before noon 12. If you check out and leave the room within the specified time, there is usually no extra charge. However, if the specified time is exceeded, the hotel may charge you some extra fees, such as overtime fee or room cleaning fee.

In addition, you need to check the cancellation policy of the hotel. If your cancellation policy is to cancel before the reservation date, otherwise the hotel will charge the full fee, then you may have to pay the full fee. If your cancellation policy is flexible, you can cancel your reservation before the check-in date and inform the hotel in advance, then you may have more choices.

In short, before booking a hotel, you must read the policies and regulations of the hotel carefully and understand your rights and responsibilities. If you need to check out early, you'd better contact the hotel as soon as possible and consult their policies and regulations.