diff --git a/main.py b/main.py
index 4c0c135f61696bcf42c375ca5ab62aa5b105afc8..5b21b1e72cd56eb683819d2010a43311aca2a09c 100644
--- a/main.py
+++ b/main.py
@@ -1 +1,4 @@
-print('欢迎来到 InsCode')
\ No newline at end of file
+def add(x,y,z=1):
+    return x+y+z
+print(add(1,2))
+print(add(1,2,3))
\ No newline at end of file