Assalamu alaikum.
I have 3 questions relating prayer of Qiyaam al-Layl & Tahajjud.
Assalamu alaikum.
I have 3 questions relating prayer of Qiyaam al-Layl & Tahajjud.
Qiyaam al-layl means spending (part of) the night in acts of worship and is more general than Tahajjud, while Tahajjud is part of it.
Obviously you must have the intention to perform the action for it to be counted as an act for worship.
This question is invalid as as they are related not mutually exclusive.
Reference: IslamQA