CONTENTS

• NAME
• SYNOPSIS
• DESCRIPTION
• BUGS
• AUTHOR

#NAME

Math::BigFloat - Arbitrary length float math package

#SYNOPSIS

use Math::BigFloat;
$f = Math::BigFloat->new($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 big floats as

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

#number format

canonical strings have the form /[+-]\d+E[+-]\d+/ . Input values can have inbedded whitespace.

#Error returns 'NaN'

An input parameter was "Not a Number" or divide by zero or sqrt of negative 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 the real thing that is currently (as of perl5.002) under development.

#AUTHOR

Mark Biggar

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