ROUND(3M) Mathematical Library Functions ROUND(3M)

NAME

round, roundf, roundl - round to nearest integer value in floating-
point format

SYNOPSIS

c99 [ flag... ] file... -lm [ library... ]
#include <math.h>

double round(double x);


float roundf(float x);


long double roundl(long double x);

DESCRIPTION

These functions round their argument to the nearest integer value in
floating-point format, rounding halfway cases away from 0, regardless
of the current rounding direction.

RETURN VALUES

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


If x is NaN, a NaN is returned.


If x is +-0 or +- Inf, x is returned.

ATTRIBUTES

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


+----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+----------------------------+-----------------------------+
|Interface Stability | Standard |
+----------------------------+-----------------------------+
|MT-Level | MT-Safe |
+----------------------------+-----------------------------+

SEE ALSO

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

SunOS 5.11 July 12, 2006 ROUND(3M)