COPYSIGN(3)

NAME
1.12 `copysign', `copysignf'--sign of Y, magnitude of X

SYNOPSIS
     #include <math.h>
     double copysign (double X, double Y);
     float copysignf (float X, float Y);

DESCRIPTION
`copysign' constructs a number with the magnitude (absolute value) of its first argument, X, and the sign of its second argument, Y.
   `copysignf' does the same thing; the two functions differ only in the type of their arguments and result.

RETURNS
`copysign' returns a `double' with the magnitude of X and the sign of Y. `copysignf' returns a `float' with the magnitude of X and the sign of Y.

PORTABILITY
`copysign' is not required by either ANSI C or the System V Interface Definition (Issue 2).

SEE ALSO
copysign is part of the library. The full documentation for is maintained as a Texinfo manual. If info and are properly installed at your site, the command

    info

will give you access to the complete manual.