Algorithm-LUHN

Changes for version 0.13

05/03/01 - Changed is_valid to always return 1 or '' (instead of 0 or sometimes undef) and it sets $ERROR when the check_digit doesn't match.
05/03/01 - Small change to the calculation of the return value of check_digit. Purely for aesthetic reasons.

Calculate the Modulus 10 Double Add Double checksum

To install Algorithm::LUHN, copy and paste the appropriate command in to your terminal.

cpanm Algorithm::LUHN

perl -MCPAN -e shell
install Algorithm::LUHN

For more information on module installation, please visit the detailed CPAN module installation guide.

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