| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 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 |
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| 32 | .\" from: @(#)sqrt.3 6.4 (Berkeley) 5/6/91 |
| 33 | .\" $FreeBSD: src/lib/msun/man/sqrt.3,v 1.12 2005/01/14 23:28:28 das 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 | .In math.h |
| 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 |
| 57 | The |
| 58 | .Fn cbrt |
| 59 | and the |
| 60 | .Fn cbrtf |
| 61 | functions compute |
| 62 | the cube root of |
| 63 | .Ar x . |
| 64 | .Pp |
| 65 | The |
| 66 | .Fn sqrt |
| 67 | and the |
| 68 | .Fn sqrtf |
| 69 | functions compute the |
| 70 | non-negative square root of x. |
| 71 | .Sh RETURN VALUES |
| 72 | The |
| 73 | .Fn cbrt |
| 74 | and the |
| 75 | .Fn cbrtf |
| 76 | functions return the requested cube root. |
| 77 | The |
| 78 | .Fn sqrt |
| 79 | and the |
| 80 | .Fn sqrtf |
| 81 | functions return the requested square root |
| 82 | unless an error occurs. |
| 83 | An attempt to take the |
| 84 | .Fn sqrt |
| 85 | of negative |
| 86 | .Fa x |
| 87 | raises an invalid exception and causes an \*(Na to be returned. |
| 88 | .Sh SEE ALSO |
| 89 | .Xr fenv 3 , |
| 90 | .Xr math 3 |
| 91 | .Sh STANDARDS |
| 92 | The |
| 93 | .Fn sqrt |
| 94 | function conforms to |
| 95 | .St -isoC . |
| 96 | .Sh HISTORY |
| 97 | The |
| 98 | .Fn cbrt |
| 99 | function appeared in |
| 100 | .Bx 4.3 . |