1Algorithm::CheckDigits:U:sMe1r1_C0o0n7t(r3i)buted Perl DAolcguomreintthamt:i:oCnheckDigits::M11_007(3)
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NAME

6       CheckDigits::M11_007 - compute check digits for VAT Registration Number
7       (FI)
8

SYNOPSIS

10         use Algorithm::CheckDigits;
11
12         $ustid = CheckDigits('ustid_fi');
13
14         if ($ustid->is_valid('13669598')) {
15               # do something
16         }
17
18         $cn = $ustid->complete('1366959');
19         # $cn = '13669598'
20
21         $cd = $ustid->checkdigit('13669598');
22         # $cd = '8'
23
24         $bn = $ustid->basenumber('13669598');
25         # $bn = '1366959';
26

DESCRIPTION

28   ALGORITHM
29       1.  Beginning left every digit is weighted with 7,9,10,5,8,4,2.
30
31       2.  The weighted digits are added.
32
33       3.  The sum from step 2 is taken modulo 11.
34
35       4.  The checkdigit is 11 minus the sum from step 3. Is the difference
36           10, the number won't be taken. If the difference is 11, the
37           checkdigit is 0.
38
39   METHODS
40       is_valid($number)
41           Returns true only if $number consists solely of digits and the
42           rightmost digit is a valid check digit according to the algorithm
43           given above.
44
45           Returns false otherwise,
46
47       complete($number)
48           The check digit for $number is computed and appended to the end of
49           $number.
50
51           Returns the complete number with check digit or '' if $number does
52           not consist solely of digits.
53
54       basenumber($number)
55           Returns the basenumber of $number if $number has a valid check
56           digit.
57
58           Return '' otherwise.
59
60       checkdigit($number)
61           Returns the check digits of $number if $number has valid check
62           digits.
63
64           Return '' otherwise.
65
66   EXPORT
67       None by default.
68

AUTHOR

70       Mathias Weidner, "<mamawe@cpan.org>"
71

SEE ALSO

73       perl, CheckDigits,
74       http://www.pruefziffernberechnung.de/U/USt-IdNr.shtml#PZFI (german)
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78perl v5.34.0                      2022-01-20Algorithm::CheckDigits::M11_007(3)
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