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IMA Associates Newsletter
October 2007


The Dash and Hyphen Distinction

Most of us know that dashes and hyphens serve different purposes, but often we have to stop and think about which to use at different points in our documents. Listed below are frequently asked questions about dashes and hyphens with answers that reflect commonly cited guidelines.

When should I use a dash?

Use a dash to set off text you want to emphasize or explain in a sentence. You may use a dash instead of a comma, semicolon, colon, or parentheses; however, some of those punctuation marks (such as parentheses) underplay words in a sentence. Although dashes call attention to specific information, use them sparingly or they will diminish your purpose.

Is there more than one type of dash?

Yes. There are a few different types, but the two you may see more often are the "em" dash (so named because in most fonts it is as wide as the letter "M") and the "en" dash (which in most fonts is as wide as the letter "N").

When would I use an "em" dash?

Use an "em" dash to

  • explain text within a sentence


  • Maria's best friend—the woman she brought to the party—grew up in the house next door.
  • emphasize a break or sudden thought in a sentence


  • Cole bought a digital camera—or maybe it was an iPod—with his birthday money.
  • connect introductory thoughts to the rest of a sentence


  • Greeting customers, processing transactions, cross-selling products—these are a bank teller's responsibilities.

When would I use an "en" dash?

Use an "en" dash to

  • show ranges of numbers such as dates, pages, etc.


  • pages 125–136

    2001–2004
  • replace a hyphen in a compound adjective to connect two compound modifiers that are either open compounds or already hyphenated compounds


  • the middle school–high school years

    a self-taught–self-motivated student

How do I type "em" and "en" dashes?

One way is to click on Insert and select Symbol. Then click on the Special Characters tab and select the dash you want. You can also follow the directions for creating a shortcut.

Another way to create an "em" dash is by typing two hyphens together. Note that other software programs may have different approaches.

When should I use a hyphen?

Use a hyphen to

  • connect compound words or phrases that come before a noun


  • a full-time employee

    a high-quality appliance


    Note that in most cases, hyphens are not used when the words follow the noun. Refer to a dictionary for the correct spelling of compound words or to a reliable business writing resource for hyphenation guidelines (see the list of resources below).

    an employee who is full time

    an appliance that is high quality


  • connect compound numbers

    twenty-six cars

    one-third of the class


  • show a word break at the end of a line


  • Renaldo visited the history museum yes-
    terday afternoon.

Should I put a space before and after dashes and hyphens?

As a rule, do not use spaces on either side of dashes and hyphens; however, some people like the look of the spaces—especially with dashes—and will use them. The important thing is to be consistent.

If you want to explore more in-depth guidelines for using dashes and hyphens, I recommend four of my favorite resources:

Online: The Chicago Manual of Style: www.chicagomanualofstyle.org

The Guide to Grammar and Writing: http://grammar.ccc.commnet.edu/grammar/
Books: The Chicago Manual of Style, 15th ed. Chicago: University of Chicago Press, 2003 Sabin, William A.

The Gregg Reference Manual, 10th ed. New York: McGraw-Hill/Irwin, 2005

Did you know...

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Ilana G. Traverse, Principal

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