1Algorithm::CheckDigits:U:sMe0r9_C0o0n1t(r3i)buted Perl DAolcguomreintthamt:i:oCnheckDigits::M09_001(3)
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NAME

6       CheckDigits::M09_001 - compute check digits for Euro notes
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SYNOPSIS

9         use Algorithm::CheckDigits;
10
11         $euro = CheckDigits('euronote');
12
13         if ($euro->is_valid('X07738250357')) {
14               # do something
15         }
16
17         $cn = $euro->complete('X0773825035');     # $cn = 'X07738250357'
18
19         $cd = $euro->checkdigit('X07738250357'); # $cd = '7'
20
21         $bn = $euro->basenumber('X07738250357'); # $bn = 'X0773825035'
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DESCRIPTION

24   ALGORITHM
25       1.  Letters are replaced with their position in the alphabet ('A' = 1,
26           ...).
27
28       2.  The total of the digits of all numbers is computed.
29
30       3.  This sum is taken modulo 9.
31
32       4.  The check digit is the difference between 8 and the number of step
33           3.
34
35       To validate the last digit of the total of the digits of all numbers
36       inclusive check digit must be 8.
37
38   METHODS
39       is_valid($number)
40           Returns true only if $number consists solely of numbers and the
41           last digit is a valid check digit according to the algorithm given
42           above.
43
44           Returns false otherwise,
45
46       complete($number)
47           The check digit for $number is computed and concatenated to the end
48           of $number.
49
50           Returns the complete number with check digit or '' if $number does
51           not consist solely of digits.
52
53       basenumber($number)
54           Returns the basenumber of $number if $number has a valid check
55           digit.
56
57           Return '' otherwise.
58
59       checkdigit($number)
60           Returns the checkdigit of $number if $number has a valid check
61           digit.
62
63           Return '' otherwise.
64
65   EXPORT
66       None by default.
67

AUTHOR

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

SEE ALSO

72       perl, CheckDigits, www.pruefziffernberechnung.de.
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76perl v5.34.0                      2022-01-20Algorithm::CheckDigits::M09_001(3)
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