CheckDigits::M10_006 - compute check digits for Rentenversicherung (DE)

       Mathias Weidner, "<mamawe@cpan.org>"

ALGORITHM
       1.  The  letter  is  replaced  with  a two-figure number appropriate to the position of the letter in the
           german alphabet.

       2.  Beginning left all numbers are weighted with 2,1,2,5,7,1,2,1,2,1,2,1.

       3.  The the total of the digits of all products is computed.

       4.  The check digit is sum from step 3 taken modulo 10.

   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.

       CheckDigits::M10_006 - compute check digits for Rentenversicherung (DE)

       perl, CheckDigits, www.pruefziffernberechnung.de.

perl v5.36.0                                       2022-10-13               Algorithm::CheckDigits::M10_006(3pm)

         use Algorithm::CheckDigits;

         $rv = CheckDigits('rentenversicherung');

         if ($rv->is_valid('65180539W001')) {
               # do something
         }

         $cn = $rv->complete('65180539W00');
         # $cn = '65180539W001'

         $cd = $rv->checkdigit('65180539W001');
         # $cd = '1'

         $bn = $rv->basenumber('65180539W001');
         # $bn = '65180539W00'