Solution to problem 20

src/Python/Problem020.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+"""
+Created on 15 Sep 2018
+
+@author: David Doblas Jiménez
+@email: daviddoji@pm.me
+
+Solution for problem 20 of Project Euler
+https://projecteuler.net/problem=20
+"""
+
+from math import factorial
+from utils import timeit
+
+
+@timeit("Problem 20")
+def compute():
+    """
+    n! means n × (n − 1) × ... × 3 × 2 × 1
+    
+    For example, 10! = 10 × 9 × ... × 3 × 2 × 1 = 3628800,
+    and the sum of the digits in the number 10! is:
+    3 + 6 + 2 + 8 + 8 + 0 + 0 = 27.
+    
+    Find the sum of the digits in the number 100!
+    """
+    fact = factorial(100)
+    sum_digits = sum(int(digit) for digit in str(fact))
+    
+    return sum_digits 
+
+
+if __name__ == "__main__":
+
+    print(f"Result for Problem 20: {compute()}")