Changes

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. {{tt|1=if (a != b)}} means ''if a is not equal to b''.<ref>[http://cermics.enpc.fr/~ts/C/CONCEPT/expressions.html C Operators/Expressions].</ref>

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. {{tt|1=if (a != b)}} means ''if a is not equal to b''.<ref>[http://cermics.enpc.fr/~ts/C/CONCEPT/expressions.html C Operators/Expressions].</ref>

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 x 4 x 3 x 2 x 1.

==Additional Reading==

==Additional Reading==

* Truss, Lynne. ''Eats, Shoots and Leaves: The Zero Tolerance Approach to Punctuation''.  2003, Gotham Books.

* Truss, Lynne. ''Eats, Shoots and Leaves: The Zero Tolerance Approach to Punctuation''.  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 ==

== References ==

{{reflist}}

{{reflist}}

[[Category:Punctuation]]

[[Category:Punctuation]]

[[Category:Programming Languages]]

[[Category:Programming Languages]]

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<!-- 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. -->