Abstract: The present invention relates to a lock (10). Particularly, the invention relates to an electronic combination lock suitable for industrial, commercial or residential use. More particularly, the present invention relates to an electronic combination lock, in which a person may input a code and the lock unlocks, if the input code equals a code stored in the lock. The lock comprises a input device (16) for inputting a code, a control unit (22) with a set of codes, one of the codes of the set of codes being set as an actual code and one of the codes of the set of codes being a subsequent code of the actual code and a lock mechanism for unlocking and locking the lock, wherein the control unit (22) causes the lock mechanism (14) to unlock, if the actual code is input to the input device (16), and the control unit (22) sets the subsequent code as the actual code, if the subsequent code is input to the input device (16).