check_isbn_13_check_digit: Check the check digit of an ISBN 13

In libbib: Various Utilities for Library Science/Assessment and Cataloging

Check the check digit of an ISBN 13

Description

Takes a string representation of an ISBN 13 and verifies that check digit checks out

Usage

check_isbn_13_check_digit(x, allow.hyphens = TRUE, errors.as.false = TRUE)

Arguments

x	A string of 13 digits
allow.hyphens	A logical indicating whether the hyphen separator should be allowed (default is TRUE)
errors.as.false	return false if error instead of throwing error (default is TRUE)

Value

Returns TRUE if check passes, FALSE if not, and NA if NA

Examples

check_isbn_13_check_digit("9780306406157")          # TRUE
check_isbn_13_check_digit("978-0-306-40615-7")      # TRUE

# vectorized
check_isbn_13_check_digit(c("978-0-306-40615-7", "9783161484103"))  # TRUE FALSE

libbib documentation built on Nov. 10, 2022, 6:16 p.m.