table of contents
| CheckDigits::M10_009(3pm) | User Contributed Perl Documentation | CheckDigits::M10_009(3pm) |
NAME¶
CheckDigits::M10_009 - compute check digits for Betriebsnummer (DE)
SYNOPSIS¶
use Algorithm::CheckDigits;
$betrnr = CheckDigits('betriebsnummer');
if ($betrnr->is_valid('73282932000074')) {
# do something
}
$cn = $betrnr->complete('7328293200007');
# $cn = '73282932000074'
$cd = $betrnr->checkdigit('73282932000074');
# $cd = '4'
$bn = $betrnr->basenumber('73282932000074');
# $bn = '7328293200007'
DESCRIPTION¶
ALGORITHM¶
- 1.
- Beginning left all numbers are weighted alternatively 1 and 2.
- 2.
- The total of the digits of all products is computed.
- 3.
- The sum of step 3 ist taken modulo 10.
- 4.
- The check digit is the difference between 10 and the number from step 3
taken modulo 10.
HINT: The last digit of the 'Betriebsnummer' may be the check digit or the last digit of the sum of the constant 5 and the check digit.
METHODS¶
- is_valid($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>
SEE ALSO¶
perl, CheckDigits, www.pruefziffernberechnung.de. www.dsi.cnrs.fr/bureau_qualite/admindonnees/documents/siren.pdf
| 2021-01-03 | perl v5.32.0 |