CheckDigits::M11_006 - compute check digits for Codigo de Cuenta Corriente (ES)

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

ALGORITHM
       1.  Beginning right all digits are weighted 6,3,7,9,10,5,8,4,2,1.

       2.  The weighted digits are added.

       3.  The sum of step 2 is taken modulo 11.

       4.  The checkdigit is 11 minus the sum from step 3.

           If the difference is 10, the checkdigit is 1.

           If the difference is 11, the checkdigit is 0.

   METHODS
       is_valid($number)
           Returns  true only if $number consists solely of numbers and hyphens and the two digits in the middle
           are valid check digits according to the algorithm given above.

           Returns false otherwise,

       complete($number)
           The check digit for $number is computed and inserted into the middle of $number.

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

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

           Return '' otherwise.

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

           Return '' otherwise.

   EXPORT
       None by default.

       CheckDigits::M11_006 - compute check digits for Codigo de Cuenta Corriente (ES)

       perl, CheckDigits, www.pruefziffernberechnung.de,

perl v5.36.0                                       2022-10-13               Algorithm::CheckDigits::M11_006(3pm)

         use Algorithm::CheckDigits;

         $ccc = CheckDigits('ccc_es');

         if ($ccc->is_valid('2420-0730-27-0050103552')) {
               # do something
         }

         $cn = $ccc->complete('2420-0730-  -0050103552');
         # $cn = '2420-0730-27-0050103552'

         $cd = $ccc->checkdigit('2420-0730-27-0050103552');
         # $cd = '27'

         $bn = $ccc->basenumber('2420-0730-27-0050103552');
         # $bn = '2420-0730-  -0050103552';