Math::BigInt

Math::BigInt(3)        Perl Programmers Reference Guide        Math::BigInt(3)



NAME
       Math::BigInt - Arbitrary size integer math package

SYNOPSIS
         use Math::BigInt;
         $i = Math::BigInt->new($string);

         $i->bneg return BINT               negation
         $i->babs return BINT               absolute value
         $i->bcmp(BINT) return CODE         compare numbers (undef,<0,=0,>0)
         $i->badd(BINT) return BINT         addition
         $i->bsub(BINT) return BINT         subtraction
         $i->bmul(BINT) return BINT         multiplication
         $i->bdiv(BINT) return (BINT,BINT)  division (quo,rem) just quo if scalar
         $i->bmod(BINT) return BINT         modulus
         $i->bgcd(BINT) return BINT         greatest common divisor
         $i->bnorm return BINT              normalization


DESCRIPTION
       All basic math operations are overloaded if you declare your big
       integers as

         $i = new Math::BigInt '123 456 789 123 456 789';


       Canonical notation
         Big integer value are strings of the form /^[+-]\d+$/ with leading
         zeros suppressed.

       Input
         Input values to these routines may be strings of the form
         /^\s*[+-]?[\d\s]+$/.

       Output
         Output values always always in canonical form

       Actual math is done in an internal format consisting of an array whose
       first element is the sign (/^[+-]$/) and whose remaining elements are
       base 100000 digits with the least significant digit first.  The string
       'NaN' is used to represent the result when input arguments are not
       numbers, as well as the result of dividing by zero.

EXAMPLES
          '+0'                            canonical zero value
          '   -123 123 123'               canonical value '-123123123'
          '1 23 456 7890'                 canonical value '+1234567890'


Autocreating constants
       After use Math::BigInt ':constant' all the integer decimal constants in
       the given scope are converted to Math::BigInt.  This conversion happens
       at compile time.

       In particular

         perl -MMath::BigInt=:constant -e 'print 2**100'

       print the integer value of 2**100.  Note that without convertion of
       constants the expression 2**100 will be calculatted as floating point
       number.

BUGS
       The current version of this module is a preliminary version of the real
       thing that is currently (as of perl5.002) under development.

AUTHOR
       Mark Biggar, overloaded interface by Ilya Zakharevich.















3rd Berkeley Distribution    perl 5.005, patch 02              Math::BigInt(3)