1Algorithm::CheckDigits:U:sMeXrX_C0o0n4t(r3i)buted Perl DAolcguomreintthamt:i:oCnheckDigits::MXX_004(3)
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NAME

6       CheckDigits::MXX_004 - compute check digits for VAT RN (AT)
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SYNOPSIS

9         use Algorithm::CheckDigits;
10
11         $vat = CheckDigits('ustid_at');
12
13         if ($vat->is_valid('U13585627')) {
14               # do something
15         }
16
17         $cn = $vat->complete('U1358562');
18         # $cn = 'U13585627'
19
20         $cd = $vat->checkdigit('U13585627');
21         # $cd = '7'
22
23         $bn = $vat->basenumber('U13585627');
24         # $bn = 'U1358562'
25

DESCRIPTION

27   ALGORITHM
28       1.  Beginning right all numbers before the check digit are weighted
29           alternatively 1 and 2.
30
31       2.  The total of the digits of all products is computed and then
32           subtracted from 96.
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34       3.  The check digit is the sum of step 3 taken modulo 10.
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36   METHODS
37       is_valid($number)
38           Returns true only if $number consists solely of numbers and the
39           last digit is a valid check digit according to the algorithm given
40           above.
41
42           Returns false otherwise,
43
44       complete($number)
45           The check digit for $number is computed and concatenated to the end
46           of $number.
47
48           Returns the complete number with check digit or '' if $number does
49           not consist solely of digits and spaces.
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51       basenumber($number)
52           Returns the basenumber of $number if $number has a valid check
53           digit.
54
55           Return '' otherwise.
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57       checkdigit($number)
58           Returns the checkdigit of $number if $number has a valid check
59           digit.
60
61           Return '' otherwise.
62
63   EXPORT
64       None by default.
65

AUTHOR

67       Mathias Weidner, "<mamawe@cpan.org>"
68

SEE ALSO

70       perl, CheckDigits, www.pruefziffernberechnung.de.
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74perl v5.36.0                      2023-01-19Algorithm::CheckDigits::MXX_004(3)
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