IPhone 5: What is the function of the camera symbol?

In lower right-hand corner of screen there's a camera icon next to the on/off slide feature. Purpose of, and how to operate?

Slide it up and it will open your camera.

Slide it up with your finger and it opens the camera.

It's much faster than unlocking your iPhone, and finding the Camera App, and opening it, then taking the picture.

Slide it up and it will open the camera app. Without unlocking your phone. It will not allow you to view photos though/

I can't get my iphone 5 off the slo mode on camera

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