How to back up my iPhone 4 notes?

How do I back up my iPhone 4 notes?

Added (1). I'm completely lost as to how to back up my Notes on my iPhone 4, if I sync normally does this save them? I have an icloud account and in my phone settings Notes is 'turned on' to back them up. However, I can't find anywhere on my email account or computer where my Notes pages are, on my email it says there are no Notes, on iCloud.com also it says there are no Notes.

Go to icloud turn on notes then back up to icloud thats what i do

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