Re: UPC Check Digit Algorithm

1.  Starting from the left, add all the ODD positions into SUM1.
2.  Multiply SUM1 * 3
3.  Starting from the left, add all the EVEN positions into SUM2
4.  Add the product from step 2 above + SUM2  (ie (SUM1*3) + SUM2)
5.  The modulo 10 check digit is the number when added to the result in step
4 gives the next higest multiple of 10.  If the sum from step 4 was 83, the
check digit is 7.

I have a routine somewhere, however it is pretty simple to write.
HTH,
Carl
Carl Galgano
EDI Consulting Services, Inc.
540 Powder Springs Street
Suite C19
Marietta, GA  30064
770-422-2995
mailto: cgalgano@ediconsulting.com
http:cgalgano.home.mindspring.com
EDI, Communications and AS400 Technical Consulting

-----Original Message-----
From: Jeff Crosby <jlcrosby@fwi.com>
Newsgroups: as400.general,comp.sys.ibm.as400.misc
To: Midrange List Server (David Gibbs) <MIDRANGE-L@midrange.com>
Date: Tuesday, December 15, 1998 9:33 AM
Subject: UPC Check Digit Algorithm


>
>Does anyone know where I can find the algorithm to calculate a UPC check
>digit?
>
>Or better yet, already have the routine written in RPG?
>
>Thanks.
>
>--
>-Jeff
>
>jlcrosby@fwi.com
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