Difference between revisions of "Exclamation mark"
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In mathematics, the exclamation mark is typically used to represent the [[factorial]] of a whole number, n, as n!. For example, 5! can be read as "5 factorial", which means "5 times 4 times 3 times 2 times 1. | In mathematics, the exclamation mark is typically used to represent the [[factorial]] of a whole number, n, as n!. For example, 5! can be read as "5 factorial", which means "5 times 4 times 3 times 2 times 1. | ||
| − | == | + | |
| − | + | ==Additional Reading== | |
| + | |||
| + | * Eats, Shoots and Leaves: The Zero Tolerance Approach to Punctuation; Truss, Lynne, 2003, Gotham Books | ||
==External Links== | ==External Links== | ||
*[http://www.nationalpunctuationday.com/exclamationpoint.html National Punctuation Day - The Exclamation Point],nationalpunctuationday.com | *[http://www.nationalpunctuationday.com/exclamationpoint.html National Punctuation Day - The Exclamation Point],nationalpunctuationday.com | ||
| + | == Reference == | ||
| + | {{reflist}} | ||
[[Category:Punctuation]] | [[Category:Punctuation]] | ||
[[Category:Programming Languages]] | [[Category:Programming Languages]] | ||
<!-- Yes, I know that this is (now) a parent category of [[cat:programming language]], but it should also be in [[cat:Human language]], [[cat:English language]], or similar, but they don't appear to exist yet. --> | <!-- Yes, I know that this is (now) a parent category of [[cat:programming language]], but it should also be in [[cat:Human language]], [[cat:English language]], or similar, but they don't appear to exist yet. --> | ||
Revision as of 20:04, January 5, 2009
An exclamation mark or exclamation point (!) is used at the end of a sentence to express surprise, disgust, admiration, etc., or to add emphasis to a command. In formal writing, however, it is rarely used.
In C and similar computer programming languages, it is used to represent "logical not" and in a pair with an equals sign (=) to represent is not equal to, e.g. if (a != b) means if a is not equal to b.[1]
In mathematics, the exclamation mark is typically used to represent the factorial of a whole number, n, as n!. For example, 5! can be read as "5 factorial", which means "5 times 4 times 3 times 2 times 1.
Additional Reading
- Eats, Shoots and Leaves: The Zero Tolerance Approach to Punctuation; Truss, Lynne, 2003, Gotham Books
External Links
- National Punctuation Day - The Exclamation Point,nationalpunctuationday.com