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. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" from: @(#)sqrt.3 6.4 (Berkeley) 5/6/91 33.\" $NetBSD: sqrt.3,v 1.11 2002/02/07 07:00:49 ross Exp $ 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 LIBRARY 45.Lb libm 46.Sh SYNOPSIS 47.Fd #include \*[Lt]math.h\*[Gt] 48.Ft double 49.Fn cbrt "double x" 50.Ft float 51.Fn cbrtf "float x" 52.Ft double 53.Fn sqrt "double x" 54.Ft float 55.Fn sqrtf "float x" 56.Sh DESCRIPTION 57The 58.Fn cbrt 59and 60.Fn cbrtf 61functions compute 62the cube root of 63.Ar x . 64.Pp 65The 66.Fn sqrt 67and 68.Fn sqrtf 69functions compute 70the non-negative square root of x. 71.Sh RETURN VALUES 72If x is negative, 73.Fn sqrt "x" 74and 75.Fn sqrtf "x" 76.\" POSIX_MODE 77set the global variable 78.Va errno 79to EDOM. 80.\" SYSV_MODE 81.\" call 82.\" .Xr matherr 3 . 83.Sh SEE ALSO 84.Xr math 3 85.\" .Xr matherr 3 86.Sh STANDARDS 87The 88.Fn sqrt 89function conforms to 90.St -ansiC . 91.Sh HISTORY 92The 93.Fn cbrt 94function appeared in 95.Bx 4.3 . 96