How to sync my iTunes on all my devices?

I have an iPhone 4 & a new iPad. I don't own a computer. How can I sync my iTunes so they are identical on both my iPhone and iPad?

You can use the iCloud system that's available on your Apple's products. For further information about iCloud click the on link below.
http://www.apple.com/.../features/

How to setup iCloud on your devices, click the on link below.
http://www.apple.com/...oud/setup/

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