Question

I want to make a negative assignment. Is this correct?

ans = - ans
if ans < 0
ans = ans + 1
...
Thanks !

Answer 1

If you just want
-1*ans
Then use:
ans = -ans

What you've got will instead increase the number by one if it's below zero. Why would you need to do that?

It's not like you're taking the negative of the binary and having to fix it manually. That stuff's done for you.

Answer 2

Thanks - we were confused with syntax spacing in the assignment. Bob and Yibo

Answer 3

one nice thing about an interpreted language is that you try things out to see how they work fairly easily
http://pastie.org/4900311