Some articles on isbn check digit, check digit, isbn, digit, isbns, digits:
... The check digit for ISBN is found as the result of taking modulo 11 ... Since this could give 11 possible results, the digit "X" is used in place of "10" ...
... The 2005 edition of the International ISBN Agency's official manual covering some ISBNs issued from January 2007, describes how the 13-digit ISBN check digit is calculated ... The calculation of an ISBN-13 check digit begins with the first 12 digits of the thirteen-digit ISBN (thus excluding the check digit itself) ... Each digit, from left to right, is alternately multiplied by 1 or 3, then those products are summed modulo 10 to give a value ranging from 0 to 9 ...
Famous quotes containing the words digit and/or check:
“Bless my soul, Sir, will you Britons not credit that an American can be a gentleman, & have read the Waverly Novels, tho every digit may have been in the tar-bucket?”
—Herman Melville (18191891)
“This fellow is wise enough to play the fool,
And to do that well craves a kind of wit.
He must observe their mood on whom he jests,
The quality of persons, and the time,
Not, like the haggard, check at every feather
That comes before his eye. This is a practice
As full of labor as a wise mans art.”
—William Shakespeare (15641616)