Provided by: libalgorithm-checkdigits-perl_0.50-1_all

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

```

SEEALSO

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