101. Punctuation should not be done for its own sake, but simply to make the meaning clearer; never punctuate where no punctuation is needed.
The following rules of punctuation are generally accepted:
The Period (.)
102. Use the period after (1) every complete sentence that is not interrogative nor exclamatory; (2) after every abbreviation; and (3) after Yes and No when used alone.
The Interrogation Point (?)
103. Use the interrogation point after every direct question.
The Exclamation Point (!)
104. Use the exclamation point after every exclamatory sentence or expression.
Alas! It is too late.
Fire if you dare!