Dashes (–) (—)
Dashes are used to show a range or in place of parentheses to show that information has been
inserted into a sentence. Dashes are only used in informal writing; in academic and business
writing, use parentheses, commas, or colons instead. Do not put a space before or after a dash.
EN dash (–)
Rule #1:
Use an en dash (the shorter dash symbol or character in most word processing programs) to show
a range of dates, numbers, or locations. In all uses of the en dash, you should be able to substitute
the word to or through for the dash. NOTE: An en dash is slightly longer than a hyphen.
Examples of Rule #1:
The report covers the period 1998–1999.
Please read pages 70–77 in your text.
The San Diego–Las Vegas flight is on time.
EM dash (—)
Rule #2:
Use an em dash (the longer dash symbol or character in most word processing programs or two
hyphens on a keyboard) to indicate an interruption or an abrupt change in thought or to insert
supplemental information. If the interruption or insertion comes in the middle of a sentence, add
a closing dash to signal the end of the interruption.
Examples of Rule #2:
Last week—I think it was Wednesday—the manual was published and distributed.
Faith, hope, and love—these virtues are very important to me.
Rule #3:
Use an em dash for emphasis in statements or examples.
Example of Rule #3:
The only exception—and it is rare—is when an extreme emergency arises.
Rule #4:
Use an em dash to set off an entire phrase that has commas within it.
Example of Rule #4:
A solid–colored top—such as the black sweater, the brown vest, or the red shirt—would
probably look best with those pants.
Rule #5:
Use an em dash before the source of a quotation when the source is listed after the quotation.
Example of Rule #5:
"Proper words in proper places make the true definition of a style." —Jonathan Swift