Talk:International Article Number/Archives/2013
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EAN-13 checksum even or odd
On another wikipedia page (http://en.wikipedia.org/wiki/Check_digit), we say both ISBN-13 and EAN-13 have the sum of the even digits multiplied by 3, whereas here it uses the odd. Which of these pages is correct? —Preceding unsigned comment added by 69.181.194.24 (talk) 19:35, 25 June 2010 (UTC)
The sum of the even digits should be multiplied by 3 in an EAN-13 code; what was mentioned on this page was "EAN-18", which seems to be an unofficial name for the Serial Shipping Container Code, the longest type of code for which the algorithm is used. I've improved the section slightly, but it could probably be moved to the GTIN page as it isn't specific to EAN-13. 86.147.155.155 (talk) 12:11, 25 September 2010 (UTC)
The article says that EAN-13 multiplies by 1 in odd digits, but in the example it calculates multiplying by 3. It also says EAN-8 reverses that, and in the example shows the EAN-8 multiplying by 1 in odd digits. It is really confusing. What is the actual weight? There has to be a definite statement to disambiguate that and the examples have to be consistent with that statement. In this page http://www.morovia.com/education/utility/upc-ean.asp it actually says the reverse of what you claim. I verified it from the example EAN-13. Odd digits are multiplied by 3. The example showing that odd digits are multiplied by 1 is wrong. — Preceding unsigned comment added by 62.103.215.171 (talk) 07:30, 25 September 2013 (UTC)