For my previous question
What is difference between a comment and an Answer?
ben gave this as answer from comment privileges page
What are comments?
Comments are temporary "Post-It" notes left on a question or answer. They can be up-voted (but not down-voted) and flagged, but do not generate reputation. There's no revision history, and when they are deleted they're gone for good.
Please note that you can always comment on your own posts, and any part of your questions. However, commenting on other people's posts is a privilege.
but what i have realized is for in this answer when someone up-voted one of my comment i got 6 reputations added to my account.
Do comments have reputations or that reputation is for some other purpose?