luhn

luhn, a Python code which demonstrates the calculation and use of the Luhn check digit for error detection.

Licensing:

The information on this web page is distributed under the MIT license.

Languages:

luhn is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.

Related Data and Programs:

bank, a Python code which computes the check digit associated with a US Bank Routing Number check digit, or reports whether a 9-digit code is actually valid.

isbn, a Python code which determines the check digit for an International Standard Book Number or reports whether a given ISBN is valid.

upc, a Python code which determines the check digit for a Uniform Product Code (UPC) or reports whether a given UPC is valid.

vin, a Python code which computes the check digit for a Vehicle Identification Number (VIN), or verifies that a given VIN is legitimate.

Source Code:

• luhn.py, the source code.
• luhn.sh, runs all the tests;
• luhn.txt, the output file;