4.3BSD-Reno/share/man/cat3/sqrt.0

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SQRT(3M)		      1986			 SQRT(3M)



NNAAMMEE
     cbrt, sqrt - cube root, square root

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<mmaatthh..hh>>

     ddoouubbllee ccbbrrtt((xx))
     ddoouubbllee xx;;

     ddoouubbllee ssqqrrtt((xx))
     ddoouubbllee xx;;

DDEESSCCRRIIPPTTIIOONN
     Cbrt(x) returns the cube root of x.

     Sqrt(x) returns the square root of x.

DDIIAAGGNNOOSSTTIICCSS
     On a VAX, sqrt(negative) returns the reserved operand and
     sets _e_r_r_n_o to EDOM .

EERRRROORR ((dduuee ttoo RRoouunnddooffff eettcc..))
     Cbrt is accurate to within 0.7 _u_l_ps.
     Sqrt on a VAX is accurate to within 0.501 _u_l_ps.
     Sqrt on a machine that conforms to IEEE 754 is correctly
     rounded in accordance with the rounding mode in force; the
     error is less than half an _u_l_p in the default mode
     (round-to-nearest).  An _u_l_p is one _Unit in the _Last _Place
     carried.

SSEEEE AALLSSOO
     math(3M), infnan(3M)

AAUUTTHHOORR
     W. Kahan




















Printed 7/27/90                May				1