Python Code Snippets: To get the sum of digits of a number

Sum of digits of number '123' is 1 + 2 + 3 = 6

What could the sum of digits of factorial of 100 which has 158 digits?

Either, you can calculate 100! and sum up the digits using a calculator, or use this simple python function:

"

import math

def sum_digits(n):

   import math

   total = 0

   for i in range(int(math.log10(n)) + 1):

      total += n % 10

      n //= 10

   return total

#taking the input

n = input()

print sum_digits(n)

"

More snippets to come soon...