Plug your iPad into your computer and start iTunes. On the left side of iTunes your iPad will be listed about midway down. Click it. In the main screen window of iTunes it will show a picture of your iPad. Below that picture is a button that says "check for update." it will tell you if you are on the current version.
That being said, why not do some research on these forums and online and learn about your iPad. The "search" button is your friend.
