The scientific package

[Tags: bsd3, library]

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


Change logchangelog
Dependenciesbase (>=4.3 && <4.9), binary (>=0.4.1 && <0.8), bytestring (==0.10.*), containers (==0.5.*), deepseq (>=1.3 && <1.5), ghc-prim, hashable (>=1.1.2 && <1.3), integer-gmp, integer-simple, text (>=0.8 && <1.3), vector (>=0.5 && <0.12) [details]
AuthorBas van Dijk
MaintainerBas van Dijk <>
Home page
Bug tracker
Source repositoryhead: git clone git://
UploadedWed Sep 30 07:16:32 UTC 2015 by BasVanDijk
DistributionsDebian:, Fedora:, FreeBSD:, LTSHaskell:, NixOS:, Stackage:
Downloads196555 total (624 in last 30 days)
0 []
StatusDocs available [build log]
Last success reported on 2015-09-30 [all 1 reports]




bytestring-builderProvide the Data.ByteString.Builder.Scientific module (requires bytestring >= 0.10)EnabledManual
integer-simpleUse the integer-simple package instead of integer-gmpDisabledAutomatic

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


Maintainers' corner

For package maintainers and hackage trustees