Create swap partition after full 17.10 installation

[decemberance]

Hello, I'm new with Linux so please bare with me.
I've already installed Ubuntu 17.10 in an empty hard drive with no swap partition.
I've read that it's better to have one.Can I create one(swap partition) after the full
installation or do I need to format the whole hard drive and re-install with more options(something else etc.)?

Thank you for your time.

[deadflowr]

Not needed as you should have a swap file already set.
Ubuntu changed from creating a swap partition to simply creating a swap file.
Which is just as good.

But if you really want to create one, here a basic rundown of swap:
https://help.ubuntu.com/community/SwapFaq

[decemberance]

Thank you very much.