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:
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—Elizabeth Wilson, U.S. crime victim. As quoted in People magazine, p. 88 (May 31, 1993)
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—Herman Melville (1819–1891)