1 files changed, 3 insertions, 1 deletions

diff --git a/gcd.lua b/gcd.lua
index 43cfad9..fe7c893 100755
--- a/gcd.lua
+++ b/gcd.lua
@@ -21,5 +21,7 @@ function gcdn(ns)
     return r
 end
 
-print(gcdn(arg))
+if #arg ~= 0 then
+    print(gcdn(arg))
+end