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.
The release is the second and final beta in the Ubuntu 15.04 development cycle and will be followed by a Release Candidate build on April 16, ahead of the final release on April 23. Beta 2 is of particular interest as it is the first milestone release that the regular Unity-using version of Ubuntu takes part in.