freebsd man page for lround

LROUND(3)						   BSD Library Functions Manual 						 LROUND(3)

NAME
     llround, llroundf, llroundl, lround, lroundf, lroundl -- convert to nearest integral value

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     long long
     llround(double x);

     long long
     llroundf(float x);

     long long
     llroundl(long double x);

     long
     lround(double x);

     long
     lroundf(float x);

     long
     lroundl(long double x);

DESCRIPTION
     The lround() function returns the integer nearest to its argument x, rounding away from zero in halfway cases.  If the rounded result is too
     large to be represented as a long value, an invalid exception is raised and the return value is undefined.  Otherwise, if x is not an inte-
     ger, lround() may raise an inexact exception.  When the rounded result is representable as a long, the expression lround(x) is equivalent to
     (long)round(x) (although the former may be more efficient).

     The llround(), llroundf(), llroundl(), lroundf() and lroundl() functions differ from lround() only in their input and output types.

SEE ALSO
     lrint(3), math(3), rint(3), round(3)

STANDARDS
     The llround(), llroundf(), llroundl(), lround(), lroundf(), and lroundl() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

HISTORY
     The float and double versions of these routines first appeared in FreeBSD 5.4.  The long double versions appeared in FreeBSD 6.0.

BSD
								   April 7, 2005							       BSD