Oops, try again. Your function fails on is_prime(3). It returns None when it should return True.
i have been struggling through most of practice section but i was almost sure this was right. it makes sense to me if i read it out loud would like to see if someone could also explain why i am off and how close was it to a good answer
def is_prime(x): if x < 2: return False if x == 2: return True if x > 2: for n in range(2,x): if x % n == 0: return False else: return True