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(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Standard │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOfeclearexcept(3M), fetestexcept(3M), math.h(3HEAD), attributes(5),
standards(5)SunOS 5.11 12 Jul 2006 round(3M)