How to display role of user on post and comments help

I am newer to WordPress and have created a nice little website with it. But I noticed that there is no way to tell if someone is an Administrator, Author, Editor, Contributor, or just a Subscriber. I have looked at other help forums through Google and cannot get any of them to work. All I want is for the rank of the user to be displayed either next to or above the comment/post. Please note that I am somewhat decent with code, but direct instructions will be best for me. IE specific file names to put code in, line to put code on, etc. Stuff like that.

EDIT: I know that admins can see ranks through the dashboard and all, but I want regular users to see others and their rank on the comments and posts the make that is lively updated.

Thank you,
~MinecraftToGo