Manual Pages for UNIX Operating System command usage for man signbit

Mathematical Library Functions                        signbit(3M)



NAME
     signbit - test sign

SYNOPSIS
     c99 [ flag... ] file... -lm [ library... ]
     #include 

     int signbit(real-floating x);


DESCRIPTION
     The signbit() macro determines whether the sign of its argu-
     ment  value  is negative. NaNs, zeros, and infinities have a
     sign bit.

RETURN VALUES
     The signbit() macro returns a non-zero value if and only  if
     the sign of its argument value is negative.

ERRORS
     No errors are defined.

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



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|
    | Standard                    | See standards(5).           |
    |_____________________________|_____________________________|


SEE ALSO
     fpclassify(3M),    isfinite(3M),    isinf(3M),    isnan(3M),
     isnormal(3M), math.h(3HEAD), attributes(5), standards(5)













SunOS 5.11          Last change: 12 Jul 2006                    1