GENWiki

Premier IT Outsourcing and Support Services within the UK

User Tools

Site Tools


man:llroundf

LROUND(3) Linux Programmer's Manual LROUND(3)

NAME

     lround,  lroundf, lroundl, llround, llroundf, llroundl - round to near-
     est integer

SYNOPSIS

     #include <math.h>
     long int lround(double x);
     long int lroundf(float x);
     long int lroundl(long double x);
     long long int llround(double x);
     long long int llroundf(float x);
     long long int llroundl(long double x);
     Link with -lm.
 Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
     All functions shown above:
         _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

DESCRIPTION

     These functions round their argument  to  the  nearest  integer  value,
     rounding halfway cases away from zero, regardless of the current round-
     ing direction (see fenv(3)).
     Note that unlike the round(3) and ceil(3), functions, the  return  type
     of these functions differs from that of their arguments.

RETURN VALUE

     These functions return the rounded integer value.
     If  x  is a NaN or an infinity, or the rounded value is too large to be
     stored in a long (long long in the case of the ll* functions),  then  a
     domain error occurs, and the return value is unspecified.

ERRORS

     See  math_error(7) for information on how to determine whether an error
     has occurred when calling these functions.
     The following errors can occur:
     Domain error: x is a NaN or infinite, or the rounded value is too large
            An invalid floating-point exception (FE_INVALID) is raised.
     These functions do not set errno.

VERSIONS

     These functions first appeared in glibc in version 2.1.

ATTRIBUTES

     For  an  explanation  of  the  terms  used   in   this   section,   see
     attributes(7).
     allbox;  lbw33  lb  lb  l  l l.  Interface Attribute Value T{ lround(),
     lroundf(), lroundl(),
     llround(), llroundf(), llroundl() T}   Thread safety  MT-Safe

CONFORMING TO

     C99, POSIX.1-2001, POSIX.1-2008.

SEE ALSO

     ceil(3), floor(3), lrint(3), nearbyint(3), rint(3), round(3)

COLOPHON

     This page is part of release 4.16 of the Linux  man-pages  project.   A
     description  of  the project, information about reporting bugs, and the
     latest    version    of    this    page,    can     be     found     at
     https://www.kernel.org/doc/man-pages/.
                                2017-09-15                         LROUND(3)
/data/webs/external/dokuwiki/data/pages/man/llroundf.txt · Last modified: 2019/05/17 09:47 by 127.0.0.1

Was this page helpful?-10+1

Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki