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UNB EE4253 Digital Communications
Department of Electrical and Computer Engineering - University of New Brunswick, Fredericton, NB, Canada
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ISBN Error Detection Tool

Error control codes can be implemented within written values such as account numbers and price tags by appending a single check digit.

0-13-139139-9
The final digit '9' serves for error control.

In the case of books, the International Standard Book Number (ISBN) adds a single check digit to create a 10-character book number. This standard was replaced by a new 13-digit version in January, 2007.

Check an ISBN-10 number by entering it in the box below. Dashes may be used between digits as desired. 



   0    1    3    1    3    9    1    3    9    9  
 x10   x9   x8   x7   x6   x5   x4   x3   x2   x1  
  --   --   --   --   --   --   --   --   --   --   
   0 +  9 + 24 +  7 + 18 + 45 +  4 +  9 + 18 +  9  = 143



143 = 0 mod 11
(check: 13 x 11 = 143 exactly)


The test PASSED since a zero result was obtained.
There is a one-in-eleven chance that a totally random number will pass this simple validity test.

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Sat May 18 13:18:36 ADT 2013
Last Updated: 17 OCT 02 		Richard Tervo [ tervo@unb.ca ] Back to the course homepage...
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