CheckDigits::MXX_004 - compute check digits for VAT RN (AT)
use Algorithm::CheckDigits; $vat = CheckDigits('ustid_at'); if ($vat->is_valid('U13585627')) { # do something } $cn = $vat->complete('U1358562'); # $cn = 'U13585627' $cd = $vat->checkdigit('U13585627'); # $cd = '7' $bn = $vat->basenumber('U13585627'); # $bn = 'U1358562'
Beginning right all numbers before the check digit are weighted alternatively 1 and 2.
The total of the digits of all products is computed and then subtracted from 96.
The check digit is the sum of step 3 taken modulo 10.
Returns true only if $number consists solely of numbers and the last digit is a valid check digit according to the algorithm given above.
$number
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.
None by default.
Mathias Weidner, <mamawe@cpan.org>
<mamawe@cpan.org>
perl, CheckDigits, www.pruefziffernberechnung.de.
To install Algorithm::CheckDigits, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Algorithm::CheckDigits
CPAN shell
perl -MCPAN -e shell install Algorithm::CheckDigits
For more information on module installation, please visit the detailed CPAN module installation guide.