Python function 返回问题，返回 None

Question

i want to calculate sum of every digit. For example, if we have number 134,we calculate 1+3+4 =8 and print it out. I did this in c, it works fine but when i try it in python it doesn't work. Here is my code: python code

Answer 1

the problem in your code is that it has no return statement; by default, Python will return None .

That being said, I would recommend you to add the code to the question in the next questions; just as skrrrt commented:).