exit usage

[Rick Weinbender <rwein@central-ph.k12.mo.us>]

I have a situation where I login as the root user,
then 'su <username>' to a user with limited rights,
and run a short script as this user.
*
My question is:
In the last line of my script, can I invoke some
form of the exit command to leave me back
at the #prompt or root user prompt?

TIA,
-Rick