Oops, try again. Your function fails on is_prime(2). It returns None when it should return True.

I have no idea what is wrong with my code pls take a look and explain the problem to me

```
def is_prime(x):
if x < 2:
return False
else:
for n in range(2, x-1):
if x%n == 0:
return False
break
else:
return True
```