RAND()
 Generates random numbers
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 Syntax

     RAND([<nStartValue>]) --> nRandomValue

 Argument

     <nStartValue>  Designates a beginning value for the random number
     generator.

 Returns

     RAND() returns a random number between 0 and 1.

 Description

     In contrast to RANDOM(), this function works with a seed algorithm.
     Multiple calls always returns the same random number sequence when it
     has the same start value.  When you first call RANDOM() without a
     parameter, it starts as if 100001 is specified as a parameter.
     Subsequent random numbers can then be influenced by the < nStartValue>.
     If this value is less than or equal to 0, the clock time is brought into
     the process.

     If you call the function with 100001 as a parameter, it allows you to
     restart the generator.  Then, if you call the function several times
     without parameter, it returns the "standard sequence" of numbers.

 Examples

     .  Call after program start:

        ? STR(RAND(), 18, 15)            // 0.831051100158447
        ? STR(RAND(), 18, 15)            // 0.557946857971956

     .  If the parameter equals 0, the clock time is incorporated.
        Even if the clock has not yet advanced, subsequent values are still
        different:

        ? STR(RAND(), 18, 15)            // Time dependent
        ? STR(RAND(), 18, 15)            // Subsequent time
                                         // dependent value

     .  Use a number greater than 0:

        ? STR(RAND(23), 18, 15)          // 0.121169930053736
        ? STR(RAND(23), 18, 15)          // 0.121169930053736

     .  Show a "new start":

        ? STR(RAND(100001), 18, 15)      // 0.831051100158447
        ? STR(RAND(), 18, 15)            // 0.557946857971956