The RAND function is one of the math and trigonometry functions. The function returns a random number greater than or equal to 0 and less than 1. It does not require any argument.
RAND()
How to apply the RAND function.
The figure below displays the result returned by the RAND function.
To generate a random real number between a and b, use the following formula replacing a and b with your own values: =RAND()*(b-a)+a