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:
“cried as he died, fearing at last the spheres’
Last sound, the world going out without a breath:
Too proud to cry, too frail to check the tears,
And caught between two nights, blindness and death.”
—Dylan Thomas (1914–1953)
“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)