AppleScript result output FAQ: How can I display the output of my AppleScript script (the AppleScript result)?
Cool, I just learned how to get AppleScript output to show up in the ScriptEditor Result tab. In short, just leave a string at the end of your AppleScript script, and it is printed in the ScriptEditor Result tab.
ScriptEditor Result output: An AppleScript output "Hello world" example
Here's a quick AppleScript result example that puts "Hello world" in the ScriptEditor Result tab: