The RAND function returns numbers from the interval [0,1), and if you need to generate numbers from another interval, you should use the following formula: =RAND() * (bâa) + a. This will return random numbers from the interval [a,b) - greater than or equal to a, and less than b.
At the time, 5.4 was made available as a beta release alongside the stable 5.3.4 release. Now that 5.4 has become the latest stable Unity release, it seems the company intends to keep the program going a beta version of Unity 5.5 is slated to debut in the near future. source.
Versions 5.2 and 5.3 of the Unity Engine will still allow Web Player content to be published, but support will disappear entirely with 5.4. At that point, Unity developers will have to use the engine's WebGL export, which is still in the preview phase but doesn't require a plugin.