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Answer: How do I round a number?

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Q&A > math > How do I round a number? - Answer contributed by buckaduck

For scientific applications requiring the use of significant figures ("sig figs"), I strongly recommend the Math::SigFigs module. Unfortunately, the CPAN testers still haven't cleared it for Windows clients, though...
use Math::SigFigs; print FormatSigFigs($number, $digits);

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