DragonFly On-Line Manual Pages


LROUND(3)	      DragonFly Library Functions Manual	     LROUND(3)

NAME

llround, llroundf, llroundl, lround, lroundf, lroundl -- convert to near- est 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 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(), 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 DragonFly 1.3. The long double versions appeared in DragonFly 2.13. DragonFly 3.9 December 21, 2011 DragonFly 3.9