bank, an Octave code which can compute the check digit associated with a US Bank Routing Number check digit, or it can report whether a 9-digit code is actually valid.
The computer code and data files made available on this web page are distributed under the MIT license
bank 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.
isbn, an Octave code which can determine the check digit for an International Standard Book Number (ISBN) or report whether a given ISBN is valid.
luhn, an Octave code which computes the Luhn check digit for a string, and can validate a string.
upc, an Octave code which determines the check digit for a Uniform Product Code (UPC) or reports whether a given UPC is valid.
vin, an Octave code which computes the check digit for a Vehicle Identification Number (VIN), or verifies that a given VIN is legitimate.