The punctuation marks that signal the end of a sentence are the period, the question mark and the exclamation mark. You use the period , by far the most common of the end punctuation marks, to terminate a sentence that makes a statement. Turn right at the stop sign. Bring me a cup of coffee and a cheese danish.
Exclamation marks are, however, rare in formal writing.
Use them sparingly, if at all. Be careful not to use a question mark at the end of an indirect question . She asked if she could play pinball. The teacher asked who was chewing gum.