scientific: Numbers represented using scientific notation

[ bsd3, data, library ] [ Propose Tags ]
Change log changelog
Dependencies base (>=4.8 && <4.11), binary (>=0.4.1 && <0.9), bytestring (>=0.9 && <0.11), bytestring‑builder (>=0.10.4 && <0.11), containers (>=0.1 && <0.6), deepseq (>=1.3 && <1.5), ghc‑prim, hashable (>=1.1.2 && <1.3), integer‑gmp, integer‑logarithms (>=1 && <1.1), integer‑simple, text (>=0.8 && <1.3), vector (>=0.7 && <0.13) [details]
License BSD-3-Clause
Author Bas van Dijk
Maintainer Bas van Dijk <>
Revised Revision 1 made by HerbertValerioRiedel at Sun Jun 4 15:03:24 UTC 2017
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Uploaded by BasVanDijk at Sun Jun 4 14:46:08 UTC 2017
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Status Docs available [build log]
Last success reported on 2017-06-04 [all 1 reports]
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Data.Scientific provides the number type Scientific. Scientific numbers are arbitrary precision and space efficient. They are represented using scientific notation. The implementation uses a coefficient c :: Integer and a base-10 exponent e :: Int. A scientific number corresponds to the Fractional number: fromInteger c * 10 ^^ e.

Note that since we're using an Int to represent the exponent these numbers aren't truly arbitrary precision. I intend to change the type of the exponent to Integer in a future release.

The main application of Scientific is to be used as the target of parsing arbitrary precision numbers coming from an untrusted source. The advantages over using Rational for this are that:

> read "1e1000000000" :: Scientific





Depend on the bytestring-builder package for backwards compatibility.


Use the integer-simple package instead of integer-gmp


Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info


Note: This package has metadata revisions in the cabal description newer than included in the tarball. To unpack the package including the revisions, use 'cabal get'.

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