floor man page on Manjaro

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FLOOR(3P)		   POSIX Programmer's Manual		     FLOOR(3P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the	 corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.

NAME
       floor, floorf, floorl — floor function

SYNOPSIS
       #include <math.h>

       double floor(double x);
       float floorf(float x);
       long double floorl(long double x);

DESCRIPTION
       The functionality described on this reference page is aligned with  the
       ISO C  standard.	 Any  conflict between the requirements described here
       and the ISO C standard is unintentional. This  volume  of  POSIX.1‐2008
       defers to the ISO C standard.

       These  functions	 shall	compute the largest integral value not greater
       than x.

RETURN VALUE
       The result shall have the same sign as x.

       Upon successful completion, these functions shall  return  the  largest
       integral	 value	not  greater  than x, expressed as a double, float, or
       long double, as appropriate for the return type of the function.

       If x is NaN, a NaN shall be returned.

       If x is ±0 or ±Inf, x shall be returned.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       The integral value returned by these functions might not be expressible
       as  an intmax_t.	 The return value should be tested before assigning it
       to an integer type to avoid the undefined results of an	integer	 over‐
       flow.

       These  functions	 may raise the inexact floating-point exception if the
       result differs in value from the argument.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       ceil(), feclearexcept(), fetestexcept(), isnan()

       Section 4.19, Treatment of Error Conditions for Mathematical Functions,
       <math.h>

COPYRIGHT
       Portions	 of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       --  Portable  Operating	System	Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
       cal  and	 Electronics  Engineers,  Inc  and  The	 Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum	 1  applied.)  In  the
       event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard
       is  the	referee document. The original Standard can be obtained online
       at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear  in  this  page  are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors,	 see  https://www.ker‐
       nel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group		     2013			     FLOOR(3P)
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