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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
     conversion of constants the expression 2**100 will be
     calculated 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.









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Created 1996-2024 by Maxim Chirkov

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