---
name: "round"
section: "3"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/round"
---

# round(3)

round to nearest integral value

## NAME

**round**, **roundf**, **roundl** – round to nearest integral value

## LIBRARY

Math Library (libm, -lm)

## SYNOPSIS

**#include \<math.h\>**

*double*\

**round**(*double x*);

*float*\

**roundf**(*float x*);

*long double*\

**roundl**(*long double x*);

## DESCRIPTION

The **round**(), **roundf**(), and **roundl**() functions return the nearest integral value to *x*; if *x* lies halfway between two integral values, then these functions return the integral value with the larger absolute value (i.e., they round away from zero).

## SEE ALSO

[ceil(3)](/ceil/3.md), [floor(3)](/floor/3.md), [ieee(3)](/ieee/3.md), [lrint(3)](/lrint/3.md), [lround(3)](/lround/3.md), [math(3)](/math/3.md), [rint(3)](/rint/3.md), [trunc(3)](/trunc/3.md)

## STANDARDS

These functions conform to ISO/IEC 9899:1999 (“ISO C99”).

## HISTORY

The **round**() and **roundf**() functions appeared in FreeBSD 5.3. The **roundl**() function appeared in FreeBSD 6.0.