From 0c8a6664382ea07f673d9b8c3c231856ee81b7f8 Mon Sep 17 00:00:00 2001
From: Kehinde Randle <19264390+Randle-Lanre@users.noreply.github.com>
Date: Mon, 10 Apr 2023 16:12:15 +0100
Subject: [PATCH] Update types-union.md

added indicator that this is scala3 only for those new to scala
---
 _overviews/scala3-book/types-union.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/_overviews/scala3-book/types-union.md b/_overviews/scala3-book/types-union.md
index 1636556767..60655989ee 100644
--- a/_overviews/scala3-book/types-union.md
+++ b/_overviews/scala3-book/types-union.md
@@ -7,6 +7,7 @@ num: 51
 previous-page: types-intersection
 next-page: types-adts-gadts
 ---
+Scala 3 only
 
 Used on types, the `|` operator creates a so-called _union type_.
 The type `A | B` represents values that are **either** of the type `A` **or** of the type `B`.