On Tue, 7 May 2002, Lindsay Davies wrote: > Yes, this will do it for you... > > a = a ^ 1 > > Lindsay Alternatively: ### a = 1 - a ### is something that can toggle between zero and one. Another one-liner could be: ### a = (a + 1) % 2 ### although that one might be a bit more expensive than the other method. So there are a lots of good choices here. Good luck!