DOKK / manpages / debian 12 / libalgorithm-checkdigits-perl / Algorithm::CheckDigits::MBase_002.3pm.en
Algorithm::CheckDigits::MBase_002(3pm) User Contributed Perl Documentation Algorithm::CheckDigits::MBase_002(3pm)

CheckDigits::MBase_002 - compute check digits for blood bags (DE), BZUe (DE), VAT Registration Number (DE)

  use Algorithm::CheckDigits;
  $bb = CheckDigits('blutbeutel');
  if ($bb->is_valid('2761011234567893')) {
        # do something
  }
  $cn = $bb->complete('276101123456789');
  # $cn = '2761011234567893'
  $cd = $bb->checkdigit('2761011234567893');
  # $cd = '3'
  $bn = $bb->basenumber('2761011234567893');
  # $bn = '276101123456789';

ALGORITHM

1.
Start with values P = 10, S = 0.
2.
Beginning left you do the following for all digits
1.
S = (P + digit) modulo 10
2.
If S is 0 then S = 10.
3.
P = (2 * S) modulo 11
3.
The check digit is (11 - P) modulo 10.

METHODS

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,

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.

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

Return '' otherwise.

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

Return '' otherwise.

EXPORT

None by default.

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

perl, CheckDigits, www.pruefziffernberechnung.de, www.eurocode.org.

2022-10-13 perl v5.34.0