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:
“Every sect is a moral check on its neighbour. Competition is as wholesome in religion as in commerce.”
—Walter Savage Landor (1775–1864)
“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)