RINT(3) | Library Functions Manual | RINT(3)

# NAME

`nearbyint`, `nearbyintf`, `nearbyintl`, `rint`, `rintf`, `rintl` —
round to integral value in floating-point format

# LIBRARY

Math Library (libm, -lm)

# SYNOPSIS

`#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);

# DESCRIPTION

The `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.

# SEE ALSO

abs(3), ceil(3), fabs(3), fenv(3), floor(3), lrint(3), math(3), round(3)

# HISTORY

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

September 13, 2015 | NetBSD 9.4