I am stuck on 6/15. The is_prime lesson

https://www.codecademy.com/courses/python-intermediate-en-rCQKw/0/6?curriculum_id=4f89dab3d788890003000096#

The code below is what i put in. In my head it makes sense, but it always fails. It says it returns None instead of True on is_prime(3)

I don't necessarily want the answer. I just want to know what I am doing wrong.

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