Will getting the newest iPhone update delete all of my stuff?

So I have an iPhone 5S and I've been on IOS 7.1.2 and I really need to update it. I would sync it to my computer but it's dead and I've lost the charger. I've asked friends if it deleted their info before and they ve said no but IIm still hesitant.

An update shouldn't erase your personal information, but it is still always a good idea to regularly backup your device; either to iCloud, Dropbox, iTunes, whatever as long as it's a good and reliable update.

If I were you, I would backup my important info first, and then update.

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