## he66666 3 years ago Questions about python: 1. If x is a list of integers, what would the function be if you have to return true if all the elements in x are 0 for the function x(y)? I got "return int(0) in hits_list" but it doesn't make sense because it can include other values with 0 in the list.. 2. f(x, y): """(integer, integer) -> boolean Return True if x and y are between 0 (included) and 8 (non-included) and false otherwise.""" I don't get how to do this when there are two variables, x and y, since I want to write a function with an if-statement.. Can someone please help me?

1. bmp

The 2. you can do something like: if (x < 8 or x >= 0) and (y < 8 or y >= 0): return True else: return False Note: I think the parenthesis are not needed, but just for clarity's sake. The 1. I didn't quite understand. Given a list of integers, it should return True if all are 0 and False otherwise? If so, do it like: for i in x: if i != 0: return False return True

2. keketsu

I agree, the first question is a little difficult to understand. @bmp, good answer. I think you meant to put "and" instead of "or" in your two comparisons. And I believe you do require parenthesis when you've got multiple comparisons as well.

3. bmp

x should be either >= 0 or < 8 and y should be either >= 0 or < 8 simultaneously, right? It's like (Ax|Bx) & (Ay|By), where A, B are the relational operations for x, y respectively. Anyway, if I have committed a mistake, sorry. My bad.

4. keketsu

If it's either >= 0 or < 8, that would include everything; all from 0 up to infinity or 8 down in the opposite direction. I think what he's looking for are the numbers between 0 and 8. Therefore, >= 0 and < 8. Right?

5. bmp

Oh, yeah. My bad. I didn't realize the basic from the or operator. I am sorry if I caused some confusion. keketsu is right, it's >= 0 and < 8. :-) Thanks for catching that.

6. keketsu

No problem. You were very quick on the answer. That kind of error is just like missing a comma.

7. he66666

Thanks so much guys! :D