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Re: Re: Not a Numberby rasta (Hermit) |
on Oct 18, 2002 at 07:45 UTC ( [id://206238]=note: print w/replies, xml ) | Need Help?? |
NaN is an IEEE standard constant which stands for Not a
Number. It is returned if an invalid operation exception
occurs within an operation. For example, sqrt(-1) will return a number with a bit configuration that is recognized as NaN because this operation would result in an imaginary number. Therefore regexps don't help us in that issue. -- yuriy
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