Unity click and drag script to rotate camera

Just googling around to find how to rotate camera with mouse click and drag. Thanks to this link: https://answers.unity.com/questions/1189946/click-and-drag-to-rotate-camera-like-a-pan.html

This code is originally taken from that link:

Then I made a slight changes to clamp vertical camera rotation:

 

JavaScript random numbers examples

Generating random numbers is a common thing in programming. Here is some examples in JavaScript: