Newbie here, and just learning Crystal. I am looking for a way to find the gaps in a series of UPC'S. I have returned a list of the 7th - 11th characters in our UPC and now I need to find the gaps. Can anyone help? Thanks

 

 

Thanks for the response, and sorry about not being clear. Below is some sample data. I have insertes our item #, UPC # (A unique 12 digit number), and then returned only places 7,8,9,10,11 in the seq clumn. There are about 2561 total UPCs, and the 7-11 numbers are the unique value. the 664232 is a prefix, and the last digit is a check digit. So is there a way to find the gaps between each UPC number? Thanks and I apoligize for not explaining it so well. I am pretty new to this stuff. THanks

 

 

Item No                            UPC Cd                       @UPC Seq

 

   F10200                          664232041074             4107

 

 

   95646-A/I                      664232041943             4194

 

 

   95646-C/B                     664232041981             4198

 

 

   D1246-O/W                   664232042728              4278

 

 

   D1250F-O/W                 664232043428              4342