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

NAME
       floor,  floorf,	floorl - largest integral value	not greater than argu-
       ment

SYNOPSIS
       #include	<math.h>

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

DESCRIPTION
       These functions round x down to the nearest integer.

RETURN VALUE
       The rounded integer value. If x is integral or infinite,	 x  itself  is
       returned.

ERRORS
       No  errors other	than EDOM and ERANGE can occur.	 If x is NaN, then NaN
       is returned and errno may be set	to EDOM.

NOTES
       SUSv2 and POSIX 1003.1-2001 contain text	about  overflow	 (which	 might
       set  errno  to ERANGE, or raise an exception).  In practice, the	result
       cannot overflow on any current machine, so this error-handling stuff is
       just nonsense.  (More precisely,	overflow can happen only when the max-
       imum value of the exponent is smaller than the number of	mantissa bits.
       For  the	IEEE-754 standard 32-bit and 64-bit floating point numbers the
       maximum value of	the exponent is	128 (resp. 1024), and  the  number  of
       mantissa	bits is	24 (resp. 53).)

CONFORMING TO
       The floor() function conforms to	SVID 3,	POSIX, BSD 4.3,	ISO 9899.  The
       other functions are from	C99.

SEE ALSO
       ceil(3),	lrint(3), nearbyint(3),	rint(3), round(3), trunc(3)

				  2001-05-31			      FLOOR(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | NOTES | CONFORMING TO | SEE ALSO

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