Example/Tutorial for variable inputs/outputs in Matlab

addNumbers.m

function varargout = addNumbers(varargin)
% addNumbers is the name of the function.
%
% This file is intended to act as an example of how variable inputs/outputs
% are used in MATLAB

% ThermoFlux 2019

% For more information on varargin (variable num of arguments in input) type the following in command prompt.
% doc varargin
% doc nargin
% doc varargout

% nargin - (Num of arguments as input) is used to find how many inputs have been passed.
% Ex: addNumbers(2,3) whould give nargin = 2
%     addNumbers(2,3,4) would give nargin = 3


% check to see if 2 inputs are given 
if(nargin == 2)
a = varargin{1};
b = varargin{2};
c = 0;
elseif(nargin == 3) % if number of inputs are 3
a = varargin{1};
b = varargin{2};
c = varargin{3};
end

% do calculations here
result = a+b+c;

result2 = a+b;

result3 = a+c;

result4 = c+b;

% assign outputs here
% varargout - (Variable arguments in output) used to provide variable
% number of arguments as output to the user.
varargout = {result, result2, result3, result4};