debian man page for algorithm::checkdigits::m11_002

CheckDigits::M11_002(3pm)				User Contributed Perl Documentation				 CheckDigits::M11_002(3pm)

NAME
       CheckDigits::M11_002 - compute check digits for PZN (DE)

SYNOPSIS
	 use Algorithm::CheckDigits;

	 $pzn = CheckDigits('pzn');

	 if ($pzn->is_valid('4877800')) {
	       # do something
	 }

	 $cn = $pzn->complete('487780');
	 # $cn = '4877800'

	 $cd = $pzn->checkdigit('4877800');
	 # $cd = '0'

	 $bn = $pzn->basenumber('4877800');
	 # $bn = '487780'

DESCRIPTION
   ALGORITHM
       1.  From left to right beginning with the first position all digits are multiplied with 2,3,4,...

       2.  The sum of all products is computed.

       3.  The checkdigit ist the sum of step 2 taken modulo 11.

       4.  If the checkdigit is '10' the whole number is not taken as a PZN.

   METHODS
       is_valid($number)
	   Returns true only if $number consists solely of numbers and the last digit is a valid check digit according to the algorithm given
	   above.

	   Returns false otherwise,

       complete($number)
	   The check digit for $number is computed and concatenated to the end of $number.

	   Returns the complete number with check digit or '' if $number does not consist solely of digits and spaces.

       basenumber($number)
	   Returns the basenumber of $number if $number has a valid check digit.

	   Return '' otherwise.

       checkdigit($number)
	   Returns the checkdigit of $number if $number has a valid check digit.

	   Return '' otherwise.

   EXPORT
       None by default.

AUTHOR
       Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de>

SEE ALSO
       perl, CheckDigits, www.pruefziffernberechnung.de.

perl v5.10.0							    2008-05-17						 CheckDigits::M11_002(3pm)