# man > Math::BigInt::FastCalc(3perl)

## NAME
    [Math::BigInt::FastCalc](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3AFastCalc/markdown) - [Math::BigInt::Calc](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3ACalc/markdown) with some XS for more speed

## SYNOPSIS
        # to use it with [Math::BigInt](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt/markdown)
        use [Math::BigInt](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt/markdown) lib => 'FastCalc';

        # to use it with [Math::BigFloat](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigFloat/markdown)
        use [Math::BigFloat](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigFloat/markdown) lib => 'FastCalc';

        # to use it with [Math::BigRat](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigRat/markdown)
        use [Math::BigRat](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigRat/markdown) lib => 'FastCalc';

## DESCRIPTION
    [Math::BigInt::FastCalc](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3AFastCalc/markdown) inherits from [Math::BigInt::Calc](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3ACalc/markdown).

    Provides support for big integer calculations. Not intended to be used by other modules. Other
    modules which sport the same functions can also be used to support [Math::BigInt](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt/markdown), like
    [Math::BigInt::GMP](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3AGMP/markdown) or [Math::BigInt::Pari](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3APari/markdown).

    In order to allow for multiple big integer libraries, [Math::BigInt](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt/markdown) was rewritten to use library
    modules for core math routines. Any module which follows the same API as this can be used
    instead by using the following:

            use [Math::BigInt](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt/markdown) lib => 'libname';

    'libname' is either the long name ('[Math::BigInt::Pari](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3APari/markdown)'), or only the short version like 'Pari'.
    To use this library:

            use [Math::BigInt](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt/markdown) lib => 'FastCalc';

## STORAGE
    [Math::BigInt::FastCalc](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3AFastCalc/markdown) works exactly like [Math::BigInt::Calc](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3ACalc/markdown). Numbers are stored in decimal form
    chopped into parts.

## METHODS
    The following functions are now implemented in FastCalc.xs:

            _is_odd         _is_even        _is_one         _is_zero
            _is_two         _is_ten
            _zero           _one            _two            _ten
            _acmp           _len
            _inc            _dec
            __strip_zeros   _copy

## BUGS
    Please report any bugs or feature requests to "bug-math-bigint-fastcalc at rt.cpan.org", or
    through the web interface at <<https://rt.cpan.org/Ticket/Create.html?Queue=Math-BigInt-FastCalc>>
    (requires login). We will be notified, and then you'll automatically be notified of progress on
    your bug as I make changes.

## SUPPORT
    You can find documentation for this module with the perldoc command.

        perldoc [Math::BigInt::FastCalc](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3AFastCalc/markdown)

    You can also look for information at:

    *   RT: CPAN's request tracker

        <<https://rt.cpan.org/Public/Dist/Display.html?Name=Math-BigInt-FastCalc>>

    *   AnnoCPAN: Annotated CPAN documentation

        <<http://annocpan.org/dist/Math-BigInt-FastCalc>>

    *   CPAN Ratings

        <<http://cpanratings.perl.org/dist/Math-BigInt-FastCalc>>

    *   Search CPAN

        <<http://search.cpan.org/dist/Math-BigInt-FastCalc/>>

    *   CPAN Testers Matrix

        <<http://matrix.cpantesters.org/?dist=Math-BigInt-FastCalc>>

    *   The Bignum mailing list

        *   Post to mailing list

            "bignum at lists.scsys.co.uk"

        *   View mailing list

            <<http://lists.scsys.co.uk/pipermail/bignum/>>

        *   Subscribe/Unsubscribe

            <<http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/bignum>>

## LICENSE
    This program is free software; you may redistribute it and/or modify it under the same terms as
    Perl itself.

## AUTHORS
    Original math code by Mark Biggar, rewritten by Tels <<http://bloodgate.com/>> in late 2000.
    Separated from BigInt and shaped API with the help of John Peacock.

    Fixed, sped-up and enhanced by Tels <http://bloodgate.com> 2001-2003. Further streamlining
    (api_version 1 etc.) by Tels 2004-2007.

    Bug-fixing by Peter John Acklam <<pjacklam@online.no>> 2010-2016.

## SEE ALSO
    [Math::BigInt::Lib](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3ALib/markdown) for a description of the API.

    Alternative libraries [Math::BigInt::Calc](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3ACalc/markdown), [Math::BigInt::GMP](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3AGMP/markdown), and [Math::BigInt::Pari](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3APari/markdown).

    Some of the modules that use these libraries [Math::BigInt](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt/markdown), [Math::BigFloat](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigFloat/markdown), and [Math::BigRat](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigRat/markdown).