On 3/13/23 17:26, Morten W. Petersen wrote: > It went into negative numbers, > when that shouldn't have been possible. > > Turns out I had a very small typo, I had =- instead of -=. > > Isn't it unpythonic to be able to make a mistake like that? > That is why I tell Alice it is always best to stay positive and use x-=-1 to avoid situations like that. *shrugs*