I don't understand why there is the following error message :
Oops, try again. Your function fails on is_prime(2). It returns None when it should return True.
this is my code
def is_prime(x): if x < 2: return False else: for n in range(2, x - 1): if x / n != x and x / n != 1: return False else: return True
Can someone help me?