By default, Ruby defines many constants and global variables that can be used in the code to get information about the current state of the application and the runtime. In this article we’ll go over most of them to understand what they are and what information we can set and get to simplify our scripts or to debug problems.

Ruby’s global constants and variables provide a lot of information about the process and the current state of the app. They can come in handy when creating new scripts and working with inputs, also when dealing with exceptions, and for debugging problems. The Ruby and OS information is also important when dealing with code that should work cross-platform.

Read more: Exploring Ruby’s Global Constants and Variables