isbn

isbn, a C code which can compute the check digit for an International Standard Book Number (ISBN), or report whether a given ISBN is valid.

Licensing:

The computer code and data files made available on this web page are distributed under the MIT license

Languages:

isbn is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs:

BANK, a C 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.

isbn_test

LUHN, a C code which computes the Luhn check digit for a string, and can validate a string.

UPC, a C code which can determine the check digit for a Uniform Product Code (UPC) or report whether a given UPC is valid.

Source Code:

• isbn.c, the source code.
• isbn.sh, compiles the source code.
• isbn.h, the include file.