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

it return error "Oops, try again. Your function fails on is_prime(9). It returns True when it should return False." what's wrong in my code tho ?