Can i factory reset my iphone if it won't even turn on

Can i factory reset my iphone if it won't even turn on? Help As soon as possible?

Added (1). I have an iphone 5s that started glitching and restarting by its self then random colour started coming up when it restarted but now it won't even turn an it goes to the apple logo for 10 seconds then shuts off! I have a warranty so am going to send it back but it says you have to factory reset your phone!

As long as you've warranty, you're covered. They're going to send you a refurbished (like new) iPhone 5S.

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