Check Digit
The final digit is a check digit which is calculated using the Luhn algorithm, defined in Annex B of ISO/IEC 7812-1.
Read more about this topic: ISO/IEC 7812
Famous quotes containing the words check and/or digit:
“The habit some writers indulge in of perpetual quotation is one it behoves lovers of good literature to protest against, for it is an insidious habit which in the end must cloud the stream of thought, or at least check spontaneity. If it be true that le style c’est l’homme, what is likely to happen if l’homme is for ever eking out his own personality with that of some other individual?”
—Dame Ethel Smyth (1858–1944)
“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 (1819–1891)