How would i "completely" delete my Windows Partition?

Hi all,
After a month use of windows, i am finding it more useful to use my mac so i have made the decision to delete my windows partition.
How would i "completely" delete my Windows Partition?
This is what i was planning on doing (Please correct any problems):
Disk Utility -> disk0s3 (windows) -> Erase (Zero out data)
Is this right or is there a more efficient way of doing this, i want to "completely remove everything in the partition, which is why i have chosen to "zero out" data.
Thanks

OK. A normal erase doesn't actually erase the file data stored on a drive. Instead, it just removes the small amount of info that tells the file system where to find that data on the drive & frees up that space so that the file system can use it for data from other files. This is much quicker than actually overwriting the file data with some other data pattern. (There really is no such thing as an "erase" in the normal sense of "remove" or "rub out" -- all the drive can do is write something over the old data to obliterate it.)
As long as the file system is working correctly, this is all that is needed to effectively "erase" the file, since whatever data patterns that space on the drive contains is treated as if it contained nothing. Special purpose forensic applications can recover some or all of that data by ignoring the file system & scouring the drive, looking for "orphaned" chunks of data & reassembling them into files. (It is a little bit like putting a filing cabinet back in order after someone has emptied all the pages & file folders into the trash.)
The OS offers a set of security measures to prevent this, the simplest of which is to "zero out" the data by overwriting it with an all zero data pattern. If you are not concerned about someone recovering sensitive data "erased" from your hard drive with one of these specialized applications, you do not need to use these measures, which are time consuming.

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