function result = lineOfx(howMany)
%lineOfx return a string made up of the letter x (howMany times)
%
% consumes: howMany, a scalar number indicating how many times
%             the letter x should appear
% produces: a string made up of the letter x that many times
%
% if x <= 0, an empty string is returned 
%
% Examples:
%    >> lineOfx(3)
%    ans = 
%    xxx
%    >> lineOfx(5)
%    ans =
%    xxxxx
%    >> lineOfx(-10)
%    ans = 
%           ''
%    >> 
% P. Conrad for CISC106, 10/07/2007
  
  result = '';
  for i=1:howMany
    result = [ result 'x' ];
  end;

  return;

end % function lineOfx