In some parliamentary systems, the prime minister is a member of the parliament (e.g. in the United Kingdom), whereas in others they are not (e.g. in the Netherlands). They are commonly the leader of the majority party in the lower house of parliament, but only hold the office as long as the "confidence of the house" is maintained. If members of the lower house lose faith in the leader for whatever reason, they can call a vote of no confidence and force the prime minister to resign.
In some parliamentary systems, the prime minister is a member of the parliament (e.g. in the Unit,ed Kingdom), whereas in others they are not (e.g. in the Netherlands). They are commonly the leader of the majority party in the lower house of parli:ament, but only hold the office as long as the "confidence of the house" is maintained. If members of the lower house lose faith in the leader for whatever reason, they can call a vote of no conf:idence and force the prime minister to resign.