nextup man page on Kali

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NEXTUP(3)		   Linux Programmer's Manual		     NEXTUP(3)

NAME
       nextup,	nextupf, nextupl, nextdown, nextdownf, nextdownl - return next
       floating-point number toward positive/negative infinity

SYNOPSIS
       #define _GNU_SOURCE     /* See feature_test_macros(7) */
       #include <math.h>

       double nextup(double x);
       float nextupf(float x);
       long double nextupl(long double x);

       double nextdown(double x);
       float nextdownf(float x);
       long double nextdownl(long double x);

       Link with -lm.

DESCRIPTION
       The nextup(), nextupf(), and nextupl() functions return the next repre‐
       sentable floating-point number greater than x.

       If x is the smallest representable negative number in the corresponding
       type, these functions return -0.	 If x is 0, the returned value is  the
       smallest representable positive number of the corresponding type.

       If x is positive infinity, the returned value is positive infinity.  If
       x is negative infinity, the returned value is the largest representable
       finite negative number of the corresponding type.

       If x is Nan, the returned value is NaN.

       The value returned by nextdown(x) is -nextup(-x), and similarly for the
       other types.

RETURN VALUE
       See DESCRIPTION.

VERSIONS
       These functions first appeared in glibc in version 2.24.

ATTRIBUTES
       For  an	explanation  of	 the  terms  used   in	 this	section,   see
       attributes(7).

       ┌─────────────────────────────────────┬───────────────┬─────────┐
       │Interface			     │ Attribute     │ Value   │
       ├─────────────────────────────────────┼───────────────┼─────────┤
       │nextup(), nextupf(), nextupl(),	     │ Thread safety │ MT-Safe │
       │nextdown(), nextdownf(), nextdownl() │		     │	       │
       └─────────────────────────────────────┴───────────────┴─────────┘
CONFORMING TO
       These  functions	 are  described	 in  IEEE  Std 754-2008 - Standard for
       Floating-Point Arithmetic and ISO/IEC TS 18661.

SEE ALSO
       nearbyint(3), nextafter(3)

COLOPHON
       This page is part of release 4.14 of the Linux  man-pages  project.   A
       description  of	the project, information about reporting bugs, and the
       latest	 version    of	  this	  page,	   can	   be	  found	    at
       https://www.kernel.org/doc/man-pages/.

GNU				  2017-09-15			     NEXTUP(3)
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