Error when trying to use a FOR loop

Sorry if this is in the archives, but I've done a search and couldn't find anything relevant. I'm running HP's
precompiledversion of 8.1.3.1 as part of their Internet Express offering, and I can't seem to run a for loop. Here's
whatI'm seeing: 

xp512-0715-0716=# FOR LV in 1..10 LOOP

xp512-0715-0716-# select * from ldevrg;

ERROR: syntax error at or near "FOR" at character 1

LINE 1: FOR LV in 1..10 LOOP
           ^

I'm still pretty new to postgres, but based on the documentation I'm not picking up what I'm doing wrong.

Help much appreciated.

Thanks,

Kevin