What they are trying to tell you is that you should always start these kinds of statements with the destination of outcome: outcome = 3-4; will result in 'outcome' being -1 3-4 = outcome; will result in your error
> this error is still buggin me, i am doing a-levels and its due tomorrow. i tried the above and it doesnt work???
And you couldn't have said this at any time in the 14 days between now and your previous post?
Like a week ago, where we would have had plenty of time to walk you through it.
Now why is that (not that I really care about your answer)