isbn

isbn, an Octave code which computes the check digit for an International Standard Book Number (ISBN), or reports 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 an Octave version and a Python version.

Related Data and Programs:

isbn_test

bank, an Octave 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.

luhn, an Octave code which computes the Luhn check digit for a string, or validates 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.

Source Code:

• ch_is_digit.m, is TRUE if a character is a decimal digit.
• ch_is_digit_test.m
• ch_is_isbn_digit.m, is TRUE if a character is an ISBN digit.
• ch_is_isbn_digit_test.m
• ch_to_digit.m, returns the value of a base 10 digit.
• ch_to_digit_test.m
• i4_to_isbn_digit.m, converts an I4 to an ISBN digit.
• i4_to_isbn_digit_test.m
• i4vec_print.m, prints an I4VEC.
• i4vec_print_test.m
• isbn_check_digit_calculate.m, determines the check digit for an ISBN.
• isbn_check_digit_calculate_test.m
• isbn_digit_to_i4.m, converts an ISBN character into an integer.
• isbn_digit_to_i4_test.m
• isbn_is_valid.m, reports whether an ISBN is valid.
• isbn_is_valid_test.m
• s_to_digits.m, extracts N digits from a string.
• s_to_digits_test.m
• s_to_isbn_digits.m, extracts N ISBN digits from a string.
• s_to_isbn_digits_test.m