function result = mySum2(x)
% mySum2   return the sum of a vector
%
% Examples:
%    >> mySum2([3 2 7])
%    ans = 12
%    >>
%    >> mySum2([])
%    ans = 0
%    >>
% P. Conrad for CISC106 10/29/07
  
  
  if ( isempty(x)  )
    
    result = 0
    
  elseif ( length(x) == 1)
    
    result = x
    
  else
    
    result =    x(1)       +    mySum2 (x(2:end))      ;
    
  end
  
  
  
  return;
  
end