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.\" 30.Dd February 15, 2020 31.Dt SQRT 3 32.Os 33.Sh NAME 34.Nm cbrt , 35.Nm cbrtf , 36.Nm cbrtl , 37.Nm sqrt , 38.Nm sqrtf , 39.Nm sqrtl 40.Nd cube root and square root functions 41.Sh LIBRARY 42.Lb libm 43.Sh SYNOPSIS 44.In math.h 45.Ft double 46.Fn cbrt "double x" 47.Ft float 48.Fn cbrtf "float x" 49.Ft long double 50.Fn cbrtl "long double x" 51.Ft double 52.Fn sqrt "double x" 53.Ft float 54.Fn sqrtf "float x" 55.Ft long double 56.Fn sqrtl "long double x" 57.Sh DESCRIPTION 58The 59.Fn cbrt , 60.Fn cbrtf , 61and 62.Fn cbrtl 63functions compute 64the cube root of 65.Fa x . 66.Pp 67The 68.Fn sqrt , 69.Fn sqrtf , 70and 71.Fn sqrtl 72functions compute the 73non-negative square root of 74.Fa x . 75.Sh RETURN VALUES 76The 77.Fn cbrt , 78.Fn cbrtf , 79and 80.Fn cbrtl 81functions return the requested cube root. 82The 83.Fn sqrt , 84.Fn sqrtf , 85and 86.Fn sqrtl 87functions return the requested square root 88unless an error occurs. 89An attempt to take the 90.Fn sqrt 91of negative 92.Fa x 93raises an invalid exception and causes an \*(Na to be returned 94(except that the square root of -0 is valid and equal to -0.) 95.Sh SEE ALSO 96.Xr fenv 3 , 97.Xr math 3 98.Sh STANDARDS 99The 100.Fn cbrt , 101.Fn cbrtf , 102.Fn cbrtl , 103.Fn sqrt , 104.Fn sqrtf , 105and 106.Fn sqrtl 107functions conform to 108.St -isoC-99 . 109.Sh HISTORY 110The 111.Fn cbrt 112function appeared in 113.Bx 4.3 . 114The 115.Fn sqrt 116function appeared in 117.At v2 . 118.Fn sqrtl 119function appeared in 120.Fx 8.0 . 121The 122.Fn cbrtl 123function appeared in 124.Fx 9.0 . 125