Algorithm::LUHN Algorithm::LUHN is a Perl module to calculate the modulus 10 double add double checksum.
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Perl module calculate calculate modulus double checksum modulus

Algorithm::LUHN Description

Algorithm::LUHN is a Perl module to calculate the modulus 10 double add double checksum. Algorithm::LUHN is a Perl module to calculate the modulus 10 double add double checksum.SYNOPSIS use Algorithm::LUHN qw/check_digit is_valid/; $c = check_digit("43881234567"); print "It worksn" if is_valid("43881234567$c"); $c = check_digit("A2C4E6G8"); # this will cause an error print "Valid LUHN characters are:n"; my %vc = Algorithm::LUHN::valid_chars(); for (sort keys %vc) { print "$_ => $vc{$_}n"; } Algorithm::LUHN::valid_chars(map {$_ => ord($_)-ord('A')+10} A..Z); $c = check_digit("A2C4E6G8"); print "It worked againn" if is_valid("A2C4E6G8$c");This module calculates the Modulus 10 Double Add Double checksum, also known as the LUHN Formula. This algorithm is used to verify credit card numbers and Standard & Poor's security identifiers such as CUSIP's and CSIN's.You can find plenty of information about the algorithm by searching the web for "modulus 10 double add double".Requirements:· Perl Requirements: · Perl

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