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signbit(3m)

Mathematical Library Functions                                     signbit(3M)



NAME
       signbit - test sign

SYNOPSIS
       c99 [ flag... ] file... -lm [ library... ]
       #include <math.h>

       int signbit(real-floating x);

DESCRIPTION
       The  signbit()  macro determines whether the sign of its argument 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(7) for descriptions of the following attributes:


       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i)


       ATTRIBUTE  TYPEATTRIBUTE  VALUE _ Interface StabilityCommitted _ Avail‐
       abilitysystem/library/math  _  MT-LevelMT-Safe  _   StandardSee   stan‐
       dards(7).


SEE ALSO
       isnormal(3M),  math.h(3HEAD),  fpclassify(3M), isfinite(3M), isinf(3M),
       isnan(3M), attributes(7), standards(7)



Solaris 11.4                     27 Sept 2016                      signbit(3M)
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