How to reset and wipe your MacBook Pro?

I wanted to restart and completely wipe my MacBook Pro (MD101). I also searched on the internet but couldn't find anything, and I just wanted to be sure whether I was doing the right thing. I have no disk because when I brought my MacBook in store everything was already installed. It would be great if you could tell me how to! Thank you :-) My operating system is OS X Mavericks.

Back up your system first.
Make sure you have an internet connection (WiFi or ethernet).
Restart your MBP and press/hold the Command+R keys until you see the Apple logo on a grey screen.
At the OS X Utilities menu, open Disk Utility, select your Macintosh HD and click on the Erase button.
Quit Disk Utility and select Reinstall OS X from the OS X Utilities menu. This will download OS X Mavericks from Apple's servers.
After the install is completed and you're at the Setup screens, use Setup to migrate your data and apps back from your back up. Make sure you create the same user account as you had before.

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