Page 929 - Wordsmith A Guide to College Writing
P. 929
End Punctuation: Period,
Question Mark, and Exclamation
Point
1
Use end punctuation correctly.
The period, the question mark, and the exclamation point are all forms
of end punctuation; that is, they signal the end of a sentence.
The Period
The period is used to mark the end of a sentence that makes a
statement.
Examples of Periods to End Sentences