mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-11-28 15:32:45 +00:00
112 lines
2.8 KiB
Groff
112 lines
2.8 KiB
Groff
.\" Copyright (c) 1985, 1991 Regents of the University of California.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" from: @(#)sqrt.3 6.4 (Berkeley) 5/6/91
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd March 1, 2008
|
|
.Dt SQRT 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm cbrt ,
|
|
.Nm cbrtf ,
|
|
.Nm sqrt ,
|
|
.Nm sqrtf ,
|
|
.Nm sqrtl
|
|
.Nd cube root and square root functions
|
|
.Sh LIBRARY
|
|
.Lb libm
|
|
.Sh SYNOPSIS
|
|
.In math.h
|
|
.Ft double
|
|
.Fn cbrt "double x"
|
|
.Ft float
|
|
.Fn cbrtf "float x"
|
|
.Ft double
|
|
.Fn sqrt "double x"
|
|
.Ft float
|
|
.Fn sqrtf "float x"
|
|
.Ft long double
|
|
.Fn sqrtl "long double x"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn cbrt
|
|
and the
|
|
.Fn cbrtf
|
|
functions compute
|
|
the cube root of
|
|
.Ar x .
|
|
.Pp
|
|
The
|
|
.Fn sqrt ,
|
|
.Fn sqrtf ,
|
|
and
|
|
.Fn sqrtl
|
|
functions compute the
|
|
non-negative square root of x.
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Fn cbrt
|
|
and the
|
|
.Fn cbrtf
|
|
functions return the requested cube root.
|
|
The
|
|
.Fn sqrt ,
|
|
.Fn sqrtf ,
|
|
and
|
|
.Fn sqrtl
|
|
functions return the requested square root
|
|
unless an error occurs.
|
|
An attempt to take the
|
|
.Fn sqrt
|
|
of negative
|
|
.Fa x
|
|
raises an invalid exception and causes an \*(Na to be returned
|
|
(except that the square root of -0 is valid and equal to -0.)
|
|
.Sh SEE ALSO
|
|
.Xr fenv 3 ,
|
|
.Xr math 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn cbrt ,
|
|
.Fn cbrtf ,
|
|
.Fn sqrt ,
|
|
.Fn sqrtf ,
|
|
and
|
|
.Fn sqrtl
|
|
functions conform to
|
|
.St -isoC-99 .
|
|
.Sh HISTORY
|
|
The
|
|
.Fn cbrt
|
|
function appeared in
|
|
.Bx 4.3 .
|
|
The
|
|
.Fn sqrtl
|
|
function appeared in
|
|
.Fx 8.0 .
|