Math::...::Calc(3perl) Perl Programmers Reference Guide Math::...::Calc(3perl)
NAME
Math::BigInt::Calc - pure Perl module to support Math::BigInt
SYNOPSIS
# to use it with Math::BigInt
use Math::BigInt lib => 'Calc';
# to use it with Math::BigFloat
use Math::BigFloat lib => 'Calc';
# to use it with Math::BigRat
use Math::BigRat lib => 'Calc';
# explicitly set base length and whether to "use integer"
use Math::BigInt::Calc base_len => 4, use_int => 1;
use Math::BigInt lib => 'Calc';
DESCRIPTION
Math::BigInt::Calc inherits from Math::BigInt::Lib.
In this library, the numbers are represented interenally in base B =
10**N, where N is the largest possible integer that does not cause
overflow in the intermediate computations. The base B elements are
stored in an array, with the least significant element stored in array
element zero. There are no leading zero elements, except a single zero
element when the number is zero. For instance, if B = 10000, the number
1234567890 is represented internally as [7890, 3456, 12].
OPTIONS
When the module is loaded, it computes the maximum exponent, i.e., power
of 10, that can be used with and without "use integer" in the
computations. The default is to use this maximum exponent. If the
combination of the 'base_len' value and the 'use_int' value exceeds the
maximum value, an error is thrown.
base_len
The base length can be specified explicitly with the 'base_len'
option. The value must be a positive integer.
use Math::BigInt::Calc base_len => 4; # use 10000 as internal base
use_int
This option is used to specify whether "use integer" should be used
in the internal computations. The value is interpreted as a boolean
value, so use 0 or "" for false and anything else for true. If the
'base_len' is not specified together with 'use_int', the current
value for the base length is used.
use Math::BigInt::Calc use_int => 1; # use "use integer" internally
METHODS
This overview constains only the methods that are specific to
"Math::BigInt::Calc". For the other methods, see Math::BigInt::Lib.
_base_len()
Specify the desired base length and whether to enable "use integer"
in the computations.
Math::BigInt::Calc -> _base_len($base_len, $use_int);
Note that it is better to specify the base length and whether to use
integers as options when the module is loaded, for example like this
use Math::BigInt::Calc base_len => 6, use_int => 1;
SEE ALSO
Math::BigInt::Lib for a description of the API.
Alternative libraries Math::BigInt::FastCalc, Math::BigInt::GMP,
Math::BigInt::Pari, Math::BigInt::GMPz, and Math::BigInt::BitVect.
Some of the modules that use these libraries Math::BigInt,
Math::BigFloat, and Math::BigRat.
perl v5.40.1 2026-08-30 Math::...::Calc(3perl)
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