Exclamation mark

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An exclamation mark.

The exclamation mark (!), otherwise known as the exclamation point, surprise mark or surprise point, is a punctuation mark. It is used to show strong emotion at the end of a sentence or after an interjection.[1]

Putting a space before an exclamation mark is incorrect.

In coding, the exclamation mark character sometimes means not. In mathematics, the use of an exclamation mark can be used for the factorial function (for example, ).[2][3][4]

Related pages[change | change source]

References[change | change source]

  1. "Exclamation Point (or Exclamation Mark)". Grammarly. 2016-02-09. Retrieved 2020-10-17.{{cite web}}: CS1 maint: url-status (link)
  2. "Compendium of Mathematical Symbols". Math Vault. 2020-03-01. Retrieved 2020-09-10.
  3. "Factorial Function !". www.mathsisfun.com. Retrieved 2020-09-10.
  4. Weisstein, Eric W. "Factorial". mathworld.wolfram.com. Retrieved 2020-09-10.