Awesome! Now let’s try something a little trickier. Try summing the digits of a number.
Write a function called
digit_sum that takes a positive integer
n as input and returns the sum of all that number’s digits. For example:
digit_sum(1234) should return
10 which is
1 + 2 + 3 + 4. (Assume that the number you are given will always be positive.)
Check the hint if you need help!