problem 20

twymer · Jun 1, 2011 · e1dbb1e · e1dbb1e
1 parent 767a981
commit e1dbb1e
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/ruby/p20.rb b/ruby/p20.rb
@@ -0,0 +1,6 @@
+# Problem 20
+# I really like using inject..
+
+n = 100
+factorial = (1..n).inject(:*)
+puts factorial.to_s.split(//).inject(0) { |sum, char| sum + char.to_i }