NEARBYINT(3)

NAME
nearbyint - round to integral value in floating-point format

SYNOPSIS
#include <math.h>
double
nearbyint(double x);
long double
nearbyintl(long double x);
float
nearbyintf(float x);

DESCRIPTION
The nearbyint() functions return the integral value (represented as a double precision number) nearest to x according to the prevailing rounding mode.

SPECIAL VALUES
nearbyint(±0) returns ±0 for all rounding modes.

nearbyint(±infinity) returns ±infinity for all rounding modes.

SEE ALSO
abs(3), fabs(3), ceil(3), floor(3), math(3)

STANDARDS
The nearbyint() functions conform to ISO/IEC 9899:1999(E).