I am having some trouble with the python lesson: Practice Makes Perfect- exercise 4. I created a code which I was looking to define as digit_sum. This code should allow me to take a positive integer n as input and return the sum of all that number’s digits. For example, digit_sum(1234) should return 10 which is 1 + 2 + 3 + 4. My code, when implemented in IDLE undefined (see version 1), works fine and achieves the objective. However when formatted as a user-defined function in (see version 2), I am unable to achieve the same results I know there are easier ways to achieve the objectives by completely re-writing my function but I was hoping to understand why the second version was not able to run as expected and what I am lacking in my understanding of the capabilities of user-defined function.
n=434 number =  while n>0: if n %10 != 0 and n>10: number.insert(0,n%10) n = int((n - n%10)/10) print(number) elif n <= 10 and n - int(n) == 0: number.insert(0,n) print(number) n=sum(number) break print (n )
many thanks in advance