function xSqr = sqr(x)

%
% Function that returns the square of its input argument.
%
%                     xSqr = sqr(x)
%
% Input:
%    x: must be a real number or variable
%
% Output:
%   xSqr: square of x
%

% set xSqr equal to the square of x
xSqr=x*x;

end
