# Need help with Exercise "Practice Makes Perfect"

#1

Hello world,

I'm stuck with this exercise, receiving the error notification as "cube(1) resulted in an error: maximum recursion depth exceeded". This is my code:

``````def cube(n):
if n == n ** 2:
return cube(n)

def by_three(n):
if n % 3 == 0:
return cube(n)
else:
return False``````

Can anyone please comment on my code?

Many thanks & Cheers,
Anh

#2

i don't understand your if statement:

``if n == n ** 2:``

could you explain the logic? Can you provide the exercise url as well? I need to have a look at the instructions/exercise.

uhm.. the error is caused by this line:

``return cube(n)``

inside your cube function, the function will endless keep calling itself. You should return `n^3`

#3

Hi Stetim94,

I created this statement because of the instruction No.2:

Make that function return the cube of that number (i.e. that number multiplied by itself and multiplied by itself once again).

Can you please have a look?

Thank you,
Anh

#4

yea, so you should return n ^ 3 (n * n * n), so not sure why you need a if statement for it?

#5

So i mis intepreted it? let me try again

#7

I got it thru. Many thanks to you