i = 0
What is your guess? Will it be -1? Or what else?
Well, today I learned that this is not going to work as I think it would :-)
Of course there's no pre-decrementation operator, there's no post-decrementation, pre-incrementation and post-incrementation also. But if you write:
You'll get invalid syntax error and you'll notice immediately that's something wrong with your code.
In case of --i it's trickier (or ++i) - it works like you would do -(-i), so if i is set to 1, you'll get 1 :-) -(-1) gives you 1.
>>> i = 1
How come I didn't notice this earlier? :-)