Luhn Calculator is a command-line utility to quickly validate a digit sequence using Luhn algorithm and calculate the next validation digit to be appended to the digit sequence to make whole sequence valid.
Validate the following invalid digit sequence 1234567890:
> luhncalc 1234567890
Sequence: 1234567890
Valid sequence: false
Next digit: 3Validate the following valid digit sequence 12345678903:
> luhncalc 12345678903
Sequence: 12345678903
Valid sequence: true
Next digit: 1This project is licensed under either of
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