Problem with multiple inputs

function varargout  = Untitled(a,varargin)
    			
    varargout{1}=0;
     if (a=='+')        
         disp('Add');        
         for i=1:nargin
            varargout{1} = varargout{1} + varargin{i};
            i=i+1;
            disp(varargout{1});
         end

     end

 end

when i put commadn in cosole program add number in loop, but next throw error

>> Untitled('+',3,3,4,10)

Add

3

6

10

20

Index exceeds the number of array elements (4).

Error in Untitled (line 11)

varargout{1} = varargout{1} + varargin{i};

And when i put disp(varargout{1}) outside loop program dont throw outputs. pls help

Answer 1

[Jan]

for i=1:nargin    

nargin is the number of all inputs. For Untitled(a,varargin) thenumber of inputs is 1 larger than the size of varargin.

Try:

for i = 1:numel(varargin)
% or
for i = 1:nargin - 1    

Hint: Omit the "i=i+1", which is useless. The loop counter is increased by the for command. It does not produce an error here, because i is not used after this line, but it is confusing. See

for k = 1:5
    fprintf('k = %d\n', k);
    k = k + 1000;
    fprintf('modificed k = %d\n', k);
end

[Czarek Czarek]

for i = 1:nargin - 1 this is answer for my question

i figured it out couple minut ago by display nargin on board :p, but thank you very much for help <3