NEARBYINT(3M) Mathematical Library Functions NEARBYINT(3M)

nearbyint, nearbyintf, nearbyintl - floating-point rounding functions

c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
double nearbyint(double x);

float nearbyintf(float x);

long double nearbyintl(long double x);

These functions round their argument to an integer value in floating-point format, using the current rounding direction and without raising the inexact floating-point exception.

Upon successful completion, these functions return the rounded integer value.

If x is NaN, a NaN is returned.

If x is ±0, ±0 is returned.

If x is ±Inf, x is returned.

See attributes(7) for descriptions of the following attributes:

Interface Stability Standard
MT-Level MT-Safe

math.h(3HEAD), feclearexcept(3M), fetestexcept(3M), attributes(7), standards(7)

July 12, 2006 SunOS 5.11