THE EXCLAMATION-POINT
This point is used in two ways:
1. It is used after a word or group of words to express command, surprise, or emotion.
2. Enclosed in brackets, it is used in a quotation to express surprise, irony, or contempt.
101. Wake up! Something is going wrong!
102. Oh, how hard my lot[!]
The practice of using two or three exclamation-points together is not now followed.