RAND(3F)                                                              RAND(3F)



NAME
       rand, drand, irand - return random values

SYNOPSIS
       function irand (iflag)

       function rand (iflag)

       double precision function drand (iflag)

DESCRIPTION
       The  newer  random(3f) should be used in new applications; rand remains
       for compatibilty.

       These functions use _r_a_n_d(3C) to generate sequences of  random  numbers.
       If  _i_f_l_a_g is ’1’, the generator is restarted and the first random value
       is returned.  If _i_f_l_a_g is otherwise non-zero, it is used as a new  seed
       for  the  random  number  generator,  and the first new random value is
       returned.

       _I_r_a_n_d returns positive integers in  the  range  0  through  2147483647.
       _R_a_n_d and _d_r_a_n_d return values in the range 0. through 1.0 .

FILES
       /usr/lib/libF77.a

SEE ALSO
       random(3F), rand(3C)

BUGS
       The algorithm returns a 15 bit quantity on the PDP11; a 31 bit quantity
       on the VAX.  _I_r_a_n_d on the PDP11 calls _r_a_n_d(3C) twice to form a  31  bit
       quantity, but bit 15 will always be 0.



4.2 Berkeley Distribution        May 15, 1985                         RAND(3F)