lround, lroundf, lroundl, llround, llroundf, llroundl - round to nearest integer
#include <math.h> long lround(double x); long lroundf(float x); long lroundl(long double x); long long llround(double x); long long llroundf(float x); long long llroundl(long double x);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
All functions shown above:
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
These functions return the rounded integer value.
x is a NaN or an infinity, or the rounded value is too large to be stored in a
long long in the case of the ll* functions), then a domain error occurs, and the return value is unspecified.
See math_error(7) for information on how to determine whether an error has occurred when calling these functions.
The following errors can occur:
xis 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
These functions first appeared in glibc in version 2.1.
C99, POSIX.1-2001, POSIX.1-2008.
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