The Quran is a divine book and scripture revealed by God Almighty on a Messenger and Prophet Muhammad (peace be upon him) for entire mankind and humanity. Quran brings peace and tranquility among the people who adopt Islam as a system in their daily lives. There are hundered and fourteen surahs - chapters of Quran.The revelation of Holy Quran has took approximately 23 years, the first surah is "Fatiah" and the last surah is "An-naas".
Total number of surahs in the Holy Quran is one hundered and fourteen 114, every surah has its own title which is consider as its core of discussion beacause of the importance of a subject for e.g Surah Al-Ahzâb the 33rd surah of Quran in which Allah Almighty has discussed the event "battle of Trench" which has a significant importance in the history of Islam, according to arabic lexicon Ahzab mean's group or party of akin minded people. Because in that battle, all those who were keeping a hatred for islam and muslims has joined together and fought a battle against Islam, Muhammad (peace be upon him) and Jamaat momineen. In a same way rest of the surahs title has explicitly described the importance of the subject.
May Allah Almighty Bless us all. (Amen)