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1.14.1.74 Random number generator
The function ‘rand()‘ produces a sequence of pseudo-random numbers between 0 and 1 using an algorithm from P. L’Ecuyer and S. Cote, "Implementing a random number package with splitting facilities", ACM Transactions on Mathematical Software, 17:98-111 (1991).
rand(0) returns a pseudo random number in the interval [0:1]
generated from the current value of two internal
32-bit seeds.
rand(-1) resets both seeds to a standard value.
rand(x) for integer 0 < x < 2^31-1 sets both internal seeds
to x.
rand({x,y}) for integer 0 < x,y < 2^31-1 sets seed1 to x and
seed2 to y.
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