Integer to base-x system using recursion in python

Question

I am trying to write a recursive code that can convert a number to any base system. for example, the integer 10 into binary would convert to 1010

So far I have this but

Answer 1

You have no return statement in your else block, and you have no recursive call to convert.

I think you want:

if a<=1:
    return str(a)
else:
    return str(convert(a//b,b)) + str(add)

as in

>>> def convert(a,b):
...   add = a%b
...   if a<=1:
...     return str(a)
...   else:
...     return str(convert(a//b,b)) + str(add)
... 
>>> convert(10,2)
'1010'

In general, try to avoid mixing types in recursive functions. It is most often the case that both your base case and your recursive case should return the same type.