Can anyone tell me where i did wrong ?
I did define digit_sum in the first line.
Here's the error msg:
"Oops, try again. Did you create a function called digit_sum? Your code threw a "local variable 'l' referenced before assignment" error.>"
def digit_sum(n): digit = 0 lis =  while n!= 0: digit = n % 10 lis.append(digit) n = n // 10 print lis for i in lis: l += i return l