minix/lib/nbsd_libm/man/sqrt.3

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.\" Copyright (c) 1985, 1991 Regents of the University of California.
.\" All rights reserved.
.\"
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" from: @(#)sqrt.3 6.4 (Berkeley) 5/6/91
.\" $NetBSD: sqrt.3,v 1.13 2003/08/07 16:44:49 agc Exp $
.\"
.Dd May 6, 1991
.Dt SQRT 3
.Os
.Sh NAME
.Nm cbrt ,
.Nm cbrtf ,
.Nm sqrt ,
.Nm sqrtf
.Nd cube root and square root functions
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn cbrt "double x"
.Ft float
.Fn cbrtf "float x"
.Ft double
.Fn sqrt "double x"
.Ft float
.Fn sqrtf "float x"
.Sh DESCRIPTION
The
.Fn cbrt
and
.Fn cbrtf
functions compute
the cube root of
.Ar x .
.Pp
The
.Fn sqrt
and
.Fn sqrtf
functions compute
the non-negative square root of x.
.Sh RETURN VALUES
If x is negative,
.Fn sqrt "x"
and
.Fn sqrtf "x"
.\" POSIX_MODE
set the global variable
.Va errno
to EDOM.
.\" SYSV_MODE
.\" call
.\" .Xr matherr 3 .
.Sh SEE ALSO
.Xr math 3
.\" .Xr matherr 3
.Sh STANDARDS
The
.Fn sqrt
function conforms to
.St -ansiC .
.Sh HISTORY
The
.Fn cbrt
function appeared in
.Bx 4.3 .