RANDOMIZE initializes the random-number generator.
RND returns a single-precision random number between 0 and 1.
 
RANDOMIZE [seed%]
RND[(n#)]
 
    - seed%    A number used to initialize the random-number generator.
               If omitted, RANDOMIZE prompts for it.
    - n#       A value that sets how RND generates the next random number:
 
               n#                             RND returns
               ---------------------------    --------------------------
               Less than 0                    The same number for any n#
               Greater than 0 (or omitted)    The next random number
               0                              The last number generated
 
Example:
    RANDOMIZE TIMER
    x% = INT(RND * 6) + 1
    y% = INT(RND * 6) + 1
    PRINT "Roll of two dice: die 1 ="; x%; "and die 2 ="; y%