Update polymorphism.go

satyamuralidhar · web-flow · commit ade298507014 · 2020-07-19T11:44:43.000+05:30
diff --git a/oops/polymorphism.go b/oops/polymorphism.go
@@ -1,3 +1,4 @@
+//polymorphism
 package main 
 import "fmt"
 type income interface{
