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.Dd February 15, 2020 29.Dt SQRT 3 30.Os 31.Sh NAME 32.Nm cbrt , 33.Nm cbrtf , 34.Nm cbrtl , 35.Nm sqrt , 36.Nm sqrtf , 37.Nm sqrtl 38.Nd cube root and square root functions 39.Sh LIBRARY 40.Lb libm 41.Sh SYNOPSIS 42.In math.h 43.Ft double 44.Fn cbrt "double x" 45.Ft float 46.Fn cbrtf "float x" 47.Ft long double 48.Fn cbrtl "long double x" 49.Ft double 50.Fn sqrt "double x" 51.Ft float 52.Fn sqrtf "float x" 53.Ft long double 54.Fn sqrtl "long double x" 55.Sh DESCRIPTION 56The 57.Fn cbrt , 58.Fn cbrtf , 59and 60.Fn cbrtl 61functions compute 62the cube root of 63.Fa x . 64.Pp 65The 66.Fn sqrt , 67.Fn sqrtf , 68and 69.Fn sqrtl 70functions compute the 71non-negative square root of 72.Fa x . 73.Sh RETURN VALUES 74The 75.Fn cbrt , 76.Fn cbrtf , 77and 78.Fn cbrtl 79functions return the requested cube root. 80The 81.Fn sqrt , 82.Fn sqrtf , 83and 84.Fn sqrtl 85functions return the requested square root 86unless an error occurs. 87An attempt to take the 88.Fn sqrt 89of negative 90.Fa x 91raises an invalid exception and causes an \*(Na to be returned 92(except that the square root of -0 is valid and equal to -0.) 93.Sh SEE ALSO 94.Xr fenv 3 , 95.Xr math 3 96.Sh STANDARDS 97The 98.Fn cbrt , 99.Fn cbrtf , 100.Fn cbrtl , 101.Fn sqrt , 102.Fn sqrtf , 103and 104.Fn sqrtl 105functions conform to 106.St -isoC-99 . 107.Sh HISTORY 108The 109.Fn cbrt 110function appeared in 111.Bx 4.3 . 112The 113.Fn sqrt 114function appeared in 115.At v2 . 116.Fn sqrtl 117function appeared in 118.Fx 8.0 . 119The 120.Fn cbrtl 121function appeared in 122.Fx 9.0 . 123