Answer:
def sum_digits(n):
  sum=0
  while n>0:
    num=n%10   #will store digits of number
    sum+=num   #sums the digits
    n=int(n/10)
  return sum  #sum of digits is returned
Explanation:
In the above method , n is the number whose digit sum is to be returned. Sum is the variable which will store the sum of digits. Then a while loop will be executed until n is greater than 0 then num will store the individual digits of number and those digits will be added in sum variable. After that, n will be divided by 10. As we want only int variable we will typecast it into int.
