1 files changed, 6 insertions, 4 deletions
diff --git a/sample/fact.rb b/sample/fact.rb
index 49678bc9d0..1462a6923a 100644
--- a/sample/fact.rb
+++ b/sample/fact.rb
@@ -1,8 +1,10 @@
 def fact(n)
-  if n == 0
-    1
-  else
-    n * fact(n-1)
+  return 1 if n == 0
+  f = 1
+  while n>0
+    f *= n
+    n -= 1
   end
+  return f
 end
 print fact(ARGV[0].to_i), "\n"