This Surah is Makki and it has a total of forty three verses. Mentioned in this Surah too there are subjects such as the truth and veracity of the Holy Qur'an, Tauhid (Oneness of Allah), Risalah (Prophethood) and answers to doubts raised about them.
The first group of letters: المر (Alif, Lam, Meem, Ra) are isolated Letters (Al-Huruf al-Muqattaat) the meaning of which are known to Allah Ta’ ala alone. The Ummah has not been informed of its meaning. It is not appropriate for the Muslim Ummah at large to indulge in investigations about them.