freebsd man page for floor

FLOOR(3)						   BSD Library Functions Manual 						  FLOOR(3)

NAME
     floor, floorf, floorl -- largest integral value less than or equal to x

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     double
     floor(double x);

     float
     floorf(float x);

     long double
     floorl(long double x);

DESCRIPTION
     The floor(), floorf() and floorl() functions return the largest integral value less than or equal to x, expressed as a floating-point number.

SEE ALSO
     abs(3), ceil(3), fabs(3), ieee(3), math(3), rint(3), round(3), trunc(3)

STANDARDS
     The floor() function conforms to ISO/IEC 9899:1990 (``ISO C90'').	The floorf() and floorl() functions conform to ISO/IEC 9899:1999
     (``ISO C99'').

BSD
								 January 13, 2005							       BSD