1.\" Copyright (c) 1985, 1991 Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" from: @(#)sqrt.3 6.4 (Berkeley) 5/6/91 29.\" $NetBSD: sqrt.3,v 1.13 2003/08/07 16:44:49 agc Exp $ 30.\" 31.Dd May 6, 1991 32.Dt SQRT 3 33.Os 34.Sh NAME 35.Nm cbrt , 36.Nm cbrtf , 37.Nm sqrt , 38.Nm sqrtf 39.Nd cube root and square root functions 40.Sh LIBRARY 41.Lb libm 42.Sh SYNOPSIS 43.In math.h 44.Ft double 45.Fn cbrt "double x" 46.Ft float 47.Fn cbrtf "float x" 48.Ft double 49.Fn sqrt "double x" 50.Ft float 51.Fn sqrtf "float x" 52.Sh DESCRIPTION 53The 54.Fn cbrt 55and 56.Fn cbrtf 57functions compute 58the cube root of 59.Ar x . 60.Pp 61The 62.Fn sqrt 63and 64.Fn sqrtf 65functions compute 66the non-negative square root of x. 67.Sh RETURN VALUES 68If x is negative, 69.Fn sqrt "x" 70and 71.Fn sqrtf "x" 72.\" POSIX_MODE 73set the global variable 74.Va errno 75to EDOM. 76.\" SYSV_MODE 77.\" call 78.\" .Xr matherr 3 . 79.Sh SEE ALSO 80.Xr math 3 81.\" .Xr matherr 3 82.Sh STANDARDS 83The 84.Fn sqrt 85function conforms to 86.St -ansiC . 87.Sh HISTORY 88The 89.Fn cbrt 90function appeared in 91.Bx 4.3 . 92