added naked return code

13_go_functions/2_a_naked_return/main.go

@@ -0,0 +1,23 @@
+package main
+
+func main() {
+
+}
+
+// Inside the if statement we are creating a new variable called err.
+// We are not using the err variable declared as the function return argument.
+// The compiler recognizes this and produces the error.
+// If the compiler did not report this error,
+// you would never see the error that occured inside the if statement.
+// The return err variable is what is passed by default
+
+// func returnID() (id int, err error) {
+// 	id = 10
+
+// 	if id == 10 {
+// 		err := fmt.Errorf("Invalid Id\n")
+// 		return
+// 	}
+
+// 	return
+// }