---
name: "Algorithm::CheckDigits::MBase_002"
section: "3pm"
platform: "linux"
package: "libalgorithm-checkdigits-perl"
version: "1.3.6-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Algorithm::CheckDigits::MBase_002"
---

# Algorithm::CheckDigits::MBase\_002(3pm)

compute check digits for blood bags (DE), BZUe (DE), VAT Registration Number (DE)

## NAME

CheckDigits::MBase\_002 - compute check digits for blood bags (DE), BZUe (DE), VAT Registration Number (DE)

## SYNOPSIS

```
  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';
```

## DESCRIPTION

### 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

- 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, `"<mamawe@cpan.org>"`

## SEE ALSO

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