LROUND(3)              FreeBSD 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 integer,
     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.

FreeBSD 13.1-RELEASE-p6          April 7, 2005         FreeBSD 13.1-RELEASE-p6