diff --git a/README.md b/README.md
index f6114a8..44d42e8 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,8 @@ fun main: int = do
     return 69;
 end;
 ```
+> The `return 69` is the exit code (like C++), try running `echo $?` to see it!
+
 Note: Everything in this project can be changed at anytime! (I'm still finding out what work best for lots of thing) if you have an idea, feel free to create an issues about it, or even create a PR! (I'd be very happy)
 
 # Prerequistie