A Christian is asking why God created mankind

 

According to the Qur'aan and/or Islamic traditions, why did God create mankind?

Praise be to Allaah. 

Allaah created the jinn and mankind to
worship Him alone, to obey His commands and heed His prohibitions. Allaah
says [in the Qur’aan] (interpretation of the meaning):

“And
I (Allaah) created not the jinn and mankind except that they should
worship Me (Alone)” [al-Dhaariyaat 51:56]

i.e.,
to believe in His Oneness and to devote their worship to Him alone,
to the exclusion of all others. One of the conditions of worship being
correct is belief in His Messenger [Muhammad]
(peace and blessings of Allaah be upon him) and following his example,
for he is the example to be followed, as Allaah says (interpretation
of the meaning):

“Indeed in the Messenger of Allaah (Muhammad)
you have a good example to follow [al-Ahzaab
33:21]