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lround(3)

NAME

     llround, llroundf, lround, lroundf -- 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
     lround(double x);

     long
     lroundf(float 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 rep-
     resentable as a long, the expression lround(x) is equivalent to
     (long)round(x) (although the former may be more efficient).

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

HISTORY

     These routines first appeared in FreeBSD 5.4.

FreeBSD 5.4		       January 11, 2005 		   FreeBSD 5.4

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