<RETURN> statement ends the current function, optionally
setting the value of
$ret to its given argument. It can be
used to end a function early when some condition or error is met.
RETURN sets a return value if an argument is given.
<A NAME=update user>
<SQL MAX=1 "select FullName from passwd where User = $user">
<IF $loop eq 0> <!-- no such $user: quit now -->
... continue to update the user ...
RETURN statement was added in version 2.1.882300000 19971216.