Please clarify queston.
Yes, what language? What platform?
I think he is asking about AS/400 Array operations, but not sure.
Because the question is like that..
Simply you can google it..
Please put some tags, then only you can get a exact answer…
i think, he asking about RPG array lookup opcode.. as well as he point is, how to use the lookup indicator….
I doubt that this is a question about the AS/400.