imp@solbourne.com (Warner Losh) (05/19/91)
Does anybody know the checksum procedure for ISBN book numbers? Warner -- Warner Losh imp@Solbourne.COM God is an Iron
hansm@cs.kun.nl (Hans Mulder) (05/21/91)
In <1991May19.022623.2905@solbourne.com> imp@solbourne.com (Warner Losh) writes: >Does anybody know the checksum procedure for ISBN book numbers? 1 * 1st digit + 2 * 2nd digit + 3 * 3rd digit + ... + 10 * 10th digit must be divisible by 11. Sometimes the last digit is an 'X'; that's a Roman digit with value 10. -- Have a nice day, Hans Mulder hansm@cs.kun.nl