Check Digit
To calculate the check digit, each digit of the ISMN is multiplied by a weight, alternating 1 and 3 left to right. These weighted digits are added together. The check digit is the integer between 0 and 9 which makes the sum a multiple of 10.
Read more about this topic: International Standard Music Number
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)
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—Herman Melville (1819–1891)