| RINT(3) | Library Functions Manual | RINT(3) | 
nearbyint, nearbyintf,
  nearbyintl, rint,
  rintf, rintl —
#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);
rint(), rintf(), and
  rintl() functions return the integral value nearest to
  x according to the prevailing rounding mode. These
  functions raise an inexact exception when the original argument is not an
  exact integer.
The nearbyint(),
    nearbyintf(), and
    nearbyintl() functions perform the same operation,
    except that they do not raise an inexact exception.
rint() function appeared in
  Version 6 AT&T UNIX.
| September 13, 2015 | NetBSD 9.4 |