Solution to problem 20 in Julia

src/Julia/Problem020.jl

@@ -0,0 +1,27 @@
+#= 
+Created on 03 Aug 2021
+
+@author: David Doblas Jiménez
+@email: daviddoji@pm.me
+
+Solution for Problem 20 of Project Euler
+https://projecteuler.net/problem=20 =#
+
+function Problem20()
+    #= 
+    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(big(100))
+    return sum(parse(Int, d) for d in string(fact))
+end
+
+
+println("Time to evaluate Problem 20:")
+@time Problem20()
+println("")
+println("Result for Problem 20: ", Problem20())