From c95fb78cf4b9ec11fcfc825a8d4c3c0f915be2be Mon Sep 17 00:00:00 2001
From: Stefan Markovic <57057282+stefansjfw@users.noreply.github.com>
Date: Thu, 2 Dec 2021 15:07:47 +0100
Subject: [PATCH] [PT Run - Calculator plugin] Allow single-digit factorial
 (#14736)

---
 .../CalculateHelper.cs                                         | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateHelper.cs b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateHelper.cs
index a1ca64aead..e49e36814a 100644
--- a/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateHelper.cs
+++ b/src/modules/launcher/Plugins/Microsoft.PowerToys.Run.Plugin.Calculator/CalculateHelper.cs
@@ -28,7 +28,8 @@ namespace Microsoft.PowerToys.Run.Plugin.Calculator
                 throw new ArgumentNullException(paramName: nameof(input));
             }
 
-            if (input.Length <= 2)
+            bool singleDigitFactorial = input.EndsWith("!", StringComparison.InvariantCulture);
+            if (input.Length <= 2 && !singleDigitFactorial)
             {
                 return false;
             }