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?