pow.3 revision 1.3
$NetBSD: pow.3,v 1.3 2024/01/26 19:27:30 nros Exp $
Copyright (c) 2011 Jukka Ruohonen <jruohonen@iki.fi>
All rights reserved.
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modification, are permitted provided that the following conditions
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THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.Dd Januray 24, 2024 .Dt POW 3 .Os .Sh NAME .Nm pow , .Nm powf , .Nm powl .Nd power functions .Sh LIBRARY .Lb libm .Sh SYNOPSIS n math.h .Ft double .Fn pow "double x" "double y" .Ft float .Fn powf "float x" "float y" .Ft long double .Fn powl "long double x" "long double y" .Sh DESCRIPTION The .Fn pow family of functions returns .Fa x raised to the power of .Fa y .
Copyright (c) 2011 Jukka Ruohonen <jruohonen@iki.fi>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
.Dd Januray 24, 2024 .Dt POW 3 .Os .Sh NAME .Nm pow , .Nm powf , .Nm powl .Nd power functions .Sh LIBRARY .Lb libm .Sh SYNOPSIS n math.h .Ft double .Fn pow "double x" "double y" .Ft float .Fn powf "float x" "float y" .Ft long double .Fn powl "long double x" "long double y" .Sh DESCRIPTION The .Fn pow family of functions returns .Fa x raised to the power of .Fa y .
p
If
.Fa x
is negative and
.Fa y
is not an integer, the global variable
.Va errno
is set to
.Er EDOM ,
and on
.Tn VAX
a reserved operand fault is generated.
A portable application should nevertheless ensure that
.Fa y
is an integer value whenever
.Fa x
is negative.
.Sh RETURN VALUES
XXX: List also the special return values?
Upon successful completion, the described functions return
.Fa x^y .
.Sh SEE ALSO
.Xr exp 3 ,
.Xr log 3
.Sh STANDARDS
The described functions conform to
.St -isoC-99 .
.Sh HISTORY
The history of the power functions dates back to
.At v6 .