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RINT(3) Library Functions Manual RINT(3)

nearbyint, nearbyintf, nearbyintl, rint, rintf, rintlround to integral value in floating-point format

#include <math.h>

double
nearbyint(double x);

float
nearbyintf(float x);

long double
nearbyintl(long double x);

double
rint(double x);

float
rintf(float x);

long double
rintl(long double x);

The (), (), and () functions return the integral value nearest to x according to the prevailing rounding mode.

The (), (), and () functions do the same, but without raising the “inexact” floating-point exception.

abs(3), ceil(3), fabs(3), floor(3)

A rint() function appeared in Version 6 AT&T UNIX.

June 5, 2013 OpenBSD-current