luhn

luhn, a C++ 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:

luhn_test

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

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

Source Code:

• luhn.cpp, the source code.
• luhn.sh, compiles the source code.
• luhn.hpp, the include file.