# $EPIC: unless.txt,v 1.2 2006/08/20 17:37:08 sthalik Exp $
======Synopsis:======
__unless__ (<condition>) <then>
__unless__ (<condition>) { <then> } [{ <else> }] \\
__unless__ (<condition>) { <then> } elsif (<condition>) { <then> } else { <then> } \\
__unless__ (<condition>) { <then> } elif (<condition>) { <then> } \\
__unless__ (<condition>) { <then> } else if (<condition>) { <then> } \\

======Description:======
__UNLESS__ is the inverse of the [[IF]] command.  If <condition> is
FALSE then <then> is is executed.  If <condition> is TRUE then any further
else oe elseif conditions are parsed until a <condition> is found that is
FALSE.  Note that even though the word "elsif" and "elif" are used, that
does not change that it is looking for a <condition> that is FALSE.

For all the other gory details, see the [[IF]] help file.

======Examples:======
   unless (1 == 1) {
      echo 1 == 1.  This is not executed, because 1 == 1 is TRUE
   } elsif (1 == 0) {
      echo 1 == 0.  This is executed because 1 == 0 is FALSE.
   } else {
      echo ha!  This is not executed because 1 == 0 is FALSE.
   }

======History:======
The __UNLESS__ command first appeared in EPIC3.