function [out1, varargout] = scope(arg1, varargin)

% This is a global variable; any functions that declar a global variable
% with the same name share it in memory.  If any other workspace uses arg2,
% after this function their value of arg2 will be changed.  After running this
% program you can type 'global arg2' in the command window to view its value
global arg2
arg2 = 21;

% Since the name of this variable is not listed in the output arguments, it
% will be trashed once the function finishes.  It only lives in this scope,
% and can be accessed neither by the command window nor sub_function
temp_variable = 23;

% run feval with this returned variable to use the function out of its
% original scope
out1 = @sub_function;

% Varargout must be a cell array
varargout = { varargin{end:-1:1}; };



function o = sub_function
% This function can only be accessed by other functions within the file
% scope.m unless its function handle is passed out of the file

o = 'MATLAB scope is a little confusing';