trunc(3) [netbsd man page]

TRUNC(3)						   BSD Library Functions Manual 						  TRUNC(3)

NAME

     trunc, truncf -- nearest integral value with magnitude less than or equal to |x|

LIBRARY

     Math Library (libm, -lm)

SYNOPSIS

     #include <math.h>

     double
     trunc(double x);

     float
     truncf(float x);

DESCRIPTION

     The trunc() and truncf() functions return the nearest integral value with magnitude less than or equal to |x|.  They are equivalent to rint()
     and rintf() respectively, in the FP_RZ rounding mode.

SEE ALSO

     ceil(3), floor(3), fpsetround(3), math(3), nextafter(3), rint(3), round(3)

STANDARDS

     The trunc() and truncf() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

BSD
								  March 31, 2006							       BSD

floor(3)						     Library Functions Manual							  floor(3)

NAME

       floor,  ceil,  modf,  nint,   rint, trunc - Round floating-point numbers to floating-point integers, return the nearest integral value, and
       truncate a floating-point number

LIBRARY

       Math Library (libm.a)

SYNOPSIS

       #include <math.h>

       double floor   (double x);
       float  floorf  (float  x);
       long double floorl   (long double x);
       double ceil    (double x);
       float  ceilf   (float  x);
       long double ceill    (long double x);
       double modf    (double x, double *n);
       float  modff   (float  x, float	*n);
       long double modfl    (long double x, long double *n);
       double nint    (double x);
       float  nintf   (float  x);
       long double nintl    (long double x);
       double rint    (double x);
       float  rintf   (float  x);
       long double rintl    (long double x);
       double trunc   (double x);
       float  truncf  (float  x);
       long double truncl   (long double x);

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       floor():  XPG4

       ceil():	XPG4

       modf():	XPG4

       rint():	XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

DESCRIPTION

       The floor(), floorf(), and floorl() functions return the largest floating-point integer value less than or equal to  x.

       The ceil(), ceilf(), and ceill() functions return the smallest floating-point integer value greater than or equal to  x.

       The modf(), modff(), and modfl() functions split a floating-point number x into a fractional part f and an integer part i such that  |f|  <
       1.0 and (f + i) = x.  Both f and i have the same sign as x.  The modf(), modff(), and modfl() functions return f and store i into the loca-
       tion pointed to by n.

       The nint(), nintf(), and nintl() functions return the nearest integral value to x, except halfway cases are rounded to the  integral  value
       larger in magnitude. This corresponds to the FORTRAN generic intrinsic function nint().

       The  rint(), rintf(),  and rintl() functions round x to an integral value according to the current IEEE rounding direction specified by the
       user.

       The trunc(), truncf(), and truncl() functions truncate x to an integral value.  delim off

																	  floor(3)