table of contents
| Algorithm::CheckDigits::M09_001(3pm) | User Contributed Perl Documentation | Algorithm::CheckDigits::M09_001(3pm) |
NAME¶
CheckDigits::M09_001 - compute check digits for Euro notes
SYNOPSIS¶
use Algorithm::CheckDigits;
$euro = CheckDigits('euronote');
if ($euro->is_valid('X07738250357')) {
# do something
}
$cn = $euro->complete('X0773825035'); # $cn = 'X07738250357'
$cd = $euro->checkdigit('X07738250357'); # $cd = '7'
$bn = $euro->basenumber('X07738250357'); # $bn = 'X0773825035'
DESCRIPTION¶
ALGORITHM¶
- 1.
- Letters are replaced with their position in the alphabet ('A' = 1, ...).
- 2.
- The total of the digits of all numbers is computed.
- 3.
- This sum is taken modulo 9.
- 4.
- The check digit is the difference between 8 and the number of step 3.
To validate the last digit of the total of the digits of all numbers inclusive check digit must be 8.
METHODS¶
- is_valid($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 $number does not consist solely of digits.
- basenumber($number)
- Returns the basenumber of $number if
$number has a valid check digit.
Return '' otherwise.
- checkdigit($number)
- Returns the checkdigit of $number if
$number has a valid check digit.
Return '' otherwise.
EXPORT¶
None by default.
AUTHOR¶
Mathias Weidner, "<mamawe@cpan.org>"
SEE ALSO¶
perl, CheckDigits, www.pruefziffernberechnung.de.
| 2021-11-19 | perl v5.32.1 |