<P> Other uses include: </P> <Ul> <Li> In mathematics it denotes the factorial operation . </Li> <Li> Several computer languages use "!" at the beginning of an expression to denote logical negation: e.g. "! A" means "the logical negation of A", also called "not A". </Li> <Li> Some languages use "!" to denote a click consonant . </Li> </Ul> <Li> In mathematics it denotes the factorial operation . </Li> <Li> Several computer languages use "!" at the beginning of an expression to denote logical negation: e.g. "! A" means "the logical negation of A", also called "not A". </Li>

What does an exclamation point in math mean
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