1Algorithm::CheckDigits:U:sMe1r1_C0o0n9t(r3i)buted Perl DAolcguomreintthamt:i:oCnheckDigits::M11_009(3)
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NAME

6       CheckDigits::M11_009 - compute check digits NRIC (SG)
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SYNOPSIS

9         use Algorithm::CheckDigits;
10
11         $nric = CheckDigits('nric_sg');
12
13         if ($nric->is_valid('S1234567D')) {
14               # do something
15         }
16
17         $cn = $nric->complete('S1234567');
18         # $cn = 'S1234567D'
19
20         $cd = $nric->checkdigit('S1234567D');
21         # $cd = 'D'
22
23         $bn = $nric->basenumber('S1234567D');
24         # $bn = 'S1234567';
25

DESCRIPTION

27   ALGORITHM
28       1.  Beginning left every digit is weighted with 2, 7, 6, 5, 4, 3, 2
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30       2.  The weighted digits are added.
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32       3.  The sum from step 2 is taken modulo 11.
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34       4.  The checkdigit is 11 minus the sum from step 3 converted to a
35           character according to the following table:
36
37             @cd = ('','A','B','C','D','E','F','G','H','I','Z','J', );
38
39   METHODS
40       is_valid($number)
41           Returns true only if $number consists of seven digits (optional
42           preceded by a letter out of 'F', 'G', 'S', 'T') followed by a valid
43           letter according to the algorithm given above.
44
45           Returns false otherwise,
46
47       complete($number)
48           The check letter for $number is computed and appended to the end of
49           $number.
50
51           Returns the complete number with check digit or '' if $number does
52           not consist solely of digits and letters.
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54       basenumber($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 '' if $number is valid.
62
63           Return undef 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 v5.30.0                      2019-07-26Algorithm::CheckDigits::M11_009(3)
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