MAN page from Old RedHat 5.X perl-5.004-4.i386.rpm

Math::BigFloat

Section: Perl Programmers Reference Guide (3)
Updated: perl 5.004, patch 04
Index

NAME

Math::BigFloat - Arbitrary length float math package

SYNOPSIS

  use Math::BogFloat;  $f = Math::BigFloat->new($string);

  $f->fadd(NSTR) return NSTR            addition  $f->fsub(NSTR) return NSTR            subtraction  $f->fmul(NSTR) return NSTR            multiplication  $f->fdiv(NSTR[,SCALE]) returns NSTR   division to SCALE places  $f->fneg() return NSTR                negation  $f->fabs() return NSTR                absolute value  $f->fcmp(NSTR) return CODE            compare undef,<0,=0,>0  $f->fround(SCALE) return NSTR         round to SCALE digits  $f->ffround(SCALE) return NSTR        round at SCALEth place  $f->fnorm() return (NSTR)             normalize  $f->fsqrt([SCALE]) return NSTR        sqrt to SCALE places

DESCRIPTION

All basic math operations are overloaded if you declare your bigfloats as

    $float = new Math::BigFloat "2.123123123123123123123123123123123";

number format: canonical strings have the form /[+-]\d+E[+-]\d+/ . Input values canhave inbedded whitespace.
Error returns `NaN': An input parameter was ``Not a Number'' or divide by zero or sqrt ofnegative number.
Division is computed to: max($div_scale,length(dividend)+length(divisor)) digits by default.Also used for default sqrt scale.

BUGS

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

AUTHOR

Mark Biggar

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