Chip Salzenberg > perl5.004 > Math::BigFloat

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By perlmonks.org
Source   Latest Release: perl-5.6.2

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 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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