1.\" $OpenBSD: sqrt.3,v 1.6 2000/03/02 00:29:50 todd Exp $ 2.\" Copyright (c) 1985, 1991 Regents of the University of California. 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. All advertising materials mentioning features or use of this software 14.\" must display the following acknowledgement: 15.\" This product includes software developed by the University of 16.\" California, Berkeley and its contributors. 17.\" 4. Neither the name of the University nor the names of its contributors 18.\" may be used to endorse or promote products derived from this software 19.\" without specific prior written permission. 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" SUCH DAMAGE. 32.\" 33.\" from: @(#)sqrt.3 6.4 (Berkeley) 5/6/91 34.\" 35.Dd May 6, 1991 36.Dt SQRT 3 37.Os 38.Sh NAME 39.Nm cbrt , 40.Nm cbrtf , 41.Nm sqrt , 42.Nm sqrtf 43.Nd cube root and square root functions 44.Sh SYNOPSIS 45.Fd #include <math.h> 46.Ft double 47.Fn cbrt "double x" 48.Ft float 49.Fn cbrtf "float x" 50.Ft double 51.Fn sqrt "double x" 52.Ft float 53.Fn sqrtf "float x" 54.Sh DESCRIPTION 55The 56.Fn cbrt 57and 58.Fn cbrtf 59functions compute 60the cube root of 61.Ar x . 62.Pp 63The 64.Fn sqrt 65and 66.Fn sqrtf 67functions compute 68the non-negative square root of x. 69.Sh RETURN VALUES 70If x is negative, 71.Fn sqrt "x" 72and 73.Fn sqrtf "x" 74sets the global variable 75.Va errno 76to EDOM. 77.Sh SEE ALSO 78.Xr math 3 79.Sh HISTORY 80The 81.Fn cbrt 82function appeared in 83.Bx 4.3 . 84