Q: What is the ruling
on clapping and whistling?
I have noticed that people applaud when someone stands, sits, or speaks during parties and in schools as well as the schoolrooms when a student knows the answer to a question, other students clap for him. What we should actually do is warn people against this. Please, advise and mention the evidence, in order to know the ruling. I also hope you can send me a book or a booklet on this topic. May Allah reward you.
Whistling is not permissible. It is linguistically called: Al-Muka' which is one of pre-Islamic customs and is considered a bad manner.
Their Salât (prayer) at the House (of Allâh, i.e. the Ka‘bah at Makkah) was nothing but whistling and clapping of hands.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.