From df746ecd471343aec2963fe55b9f010fdc027434 Mon Sep 17 00:00:00 2001
From: Alireza6677 <alireza6677@gmail.com>
Date: Sat, 20 Feb 2021 23:43:44 +0330
Subject: [PATCH] Add instructions for arguments

---
 readme.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/readme.md b/readme.md
index b76dce7..20c0246 100644
--- a/readme.md
+++ b/readme.md
@@ -27,6 +27,7 @@ Usage: calcool [OPTION] [ARGUMENT]
         -c : Calculate the given expression
 ```
 
+You can run it without arguments to open an interactive shell.
 ### Use as a library
 
 Add calcool to your dependencies