[Zope] Stupid DTML Question

Is there a way in a DTML method to create a new variable, assigning it an initial value, and then change the value later? Something like: flag = false if some condition flag = true if flag do something else do something else. I know that I can create a variable using Let, but I don't see how I can change the value of that variable after it has been created. Thanks. James Howe internet: mailto:jwh@allencreek.com Allen Creek Software, Inc. pgpkey: http://ic.net/~jwh/pgpkey.html Ann Arbor, MI 48103