A fairly simple solution - one that I thought I had tried but obviously not.
This is what I chose to use:
export PREV_RUN_DATE=$(( $RUN_DATE - 1 ))
This also worked:
let PREV_RUN_DATE=$RUN_DATE-1
Thanks to Charlie Ballowe, Bob Sloane, Mark Scarborough, and Dr. Tom Blinn
ORIGINAL QUESTION
=================
I don't know what I'm missing -- all I want to do is do some very basic math on a variable but I can't figure it out. I've searched the archives, google, manuals, etc. and can't find anything that clarifies it.
I have a variable $RUN_DAY and I want to subtract one (1) from it. How do I do that?
I thought it would be:
export PREV_DAY=${RUN_DAY}-1
but it doesn't work. I've tried quite a number of variations on this all to no avail.
I'm using:
Tru64 5.1A
korn shell (ksh)
Thank you!
Andy Cohen
Database Systems Administrator
Cognex Corporation
1 Vision Drive
Natick, MA 01760
508-650-3079
Received on Wed Jun 30 2004 - 20:30:03 NZST