Does deleting Facebook account delete all comments?

Beside this, how can I delete all my facebook comments at once?

Go to Activity Log > Manage Activity and tap on the popup that says Your Posts. Once you see the list of your posts, you can select all posts you want to archive or delete, and hit that option accordingly.

Additionally, what do friends see when you delete facebook account? When your Facebook account is deactivated:

1. No one else can see your profile.
2. Some information, like messages you sent to friends, may still be visible.
3. Your friends may still see your name in their friends list.
4. Group admins may still be able to see your posts and comments, along with your name.

In respect to this, will deleting my Facebook account delete messages?

When you delete your account, people won't be able to see it on Facebook. Some of the things you do on Facebook aren't stored in your account. For example, a friend may still have messages from you even after you delete your account. That information remains after you delete your account.

How can I delete everything on my Facebook?

Go to Settings. Click Apps and Websites, Check all apps and then clicking "Remove."

To do so, do this:

1. Click on down arrow in the upper right corner of Facebook.
2. Click on Activity log.
3. Click on the pencil icon next to any item you want to remove and click Delete/Unlike.