Algorithm::CheckDigits::M97_002 man page on Pidora

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CheckDigits::M97_002(3User Contributed Perl DocumentatiCheckDigits::M97_002(3)

NAME
       CheckDigits::M97_002 - compute check digits for International Bank
       Account Number (IBAN)

SYNOPSIS
	 use Algorithm::CheckDigits;

	 $iban = CheckDigits('iban');

	 if ($iban->is_valid('DE88 2008 0000 09703 7570 0')) {
	       # do something
	 }

	 $cn = $iban->complete('DE00 2008 0000 09703 7570 0');
	 # $cn = 'DE88 2008 0000 09703 7570 0'

	 $cd = $iban->checkdigit('DE88 2008 0000 09703 7570 0');
	 # $cd = '88'

	 $bn = $iban->basenumber('DE88 2008 0000 09703 7570 0');
	 # $bn = 'DE00 2008 0000 09703 7570 0'

DESCRIPTION
   ALGORITHM
       0   The IBAN number must be prepared. The first two letters and the
	   checksum will be moved to the right end. The letters are
	   substituted according to the substitute table and the checksum is
	   set to '00'.

       1   The whole number is taken modulo 97.

       2   The checksum is difference between 98 and the sum of step 2.

       3   If the checksum is smaller then 10, a leading zero will be
	   prepended.

   METHODS
       is_valid($number)
	   Returns true only if $number consists solely of numbers and the
	   last digit is a valid check digit according to the algorithm given
	   above.

	   Returns false otherwise,

       complete($number)
	   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.

       basenumber($number)
	   Returns the basenumber of $number if $number has a valid check
	   digit.

	   Return '' otherwise.

       checkdigit($number)
	   Returns the checkdigits of $number if $number has a valid check
	   digit.

	   Return '' otherwise.

   EXPORT
       None by default.

AUTHOR
       Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de>

THANKS
       Detlef Pilzecker pointed out to me that there may be more letters as
       the first two in an IBAN number. He also made me aware of a faster
       method to compute the check number than using Math::BigInt.

SEE ALSO
       perl, CheckDigits, www.pruefziffernberechnung.de,
       www.sic.ch/en/tkicch_home/tkicch_standardization/tkicch_financialinstitutions_ibanipi.htm.

perl v5.14.1			  2009-11-20	       CheckDigits::M97_002(3)
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