copysign(3M)

NAME

     copysign - return magnitude of first argument  and  sign  of
     second argument

SYNOPSIS

     cc [ flag ... ] file ... -lm [ library ... ]
     #include <math.h>

     double copysign(double x, double y);

DESCRIPTION

     The copysign() function returns a value with  the  magnitude
     of x and the sign of y. It produces a NaN with the sign of y
     if x is a NaN.

RETURN VALUES

     The copysign() function returns a value with  the  magnitude
     of x and the sign of y.

ATTRIBUTES

     See attributes(5) for descriptions of the  following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|

SEE ALSO

     attributes(5)