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########################################################################
##
## Copyright (C) 2008-2024 The Octave Project Developers
##
## See the file COPYRIGHT.md in the top-level directory of this
## distribution or <https://octave.org/copyright/>.
##
## This file is part of Octave.
##
## Octave is free software: you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING. If not, see
## <https://www.gnu.org/licenses/>.
##
########################################################################
## -*- texinfo -*-
## @deftypefn {} {@var{z} =} realpow (@var{x}, @var{y})
## Compute the real-valued, element-by-element power operator.
##
## This is equivalent to @w{@code{@var{x} .^ @var{y}}}, except that
## @code{realpow} reports an error if any return value is complex.
## @seealso{power, reallog, realsqrt}
## @end deftypefn
function z = realpow (x, y)
if (nargin != 2)
print_usage ();
endif
z = x .^ y;
if (iscomplex (z))
error ("realpow: produced complex result");
endif
endfunction
%!assert (realpow (1:10, 0.5:0.5:5), power (1:10, 0.5:0.5:5))
%!assert (realpow (1:10, 0.5:0.5:5), [1:10] .^ [0.5:0.5:5])
%!test
%! x = rand (10, 10);
%! y = randn (10, 10);
%! assert (x.^y, realpow (x,y));
%!assert <47775> (realpow (1i,2), -1)
%!error <Invalid call> realpow ()
%!error <Invalid call> realpow (1)
%!error <produced complex result> realpow (-1, 1/2)
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