Syntax: @RAND
@RAND returns a uniformly distributed random number on the interval [0, 1). The number will change every time the sheet is recalculated.
Examples:
@RAND = 0.38952085, a number greater than or equal to 0 and less than 1
@RAND * 10 = 7.6609264, a number greater than or equal to 0 and less than 10