% ----------------------------------------------------------------------
% A simple program to demonstrate IF-THEN-ELSE; test the sign of a given number
% The general syntax is:
%   if condition1
%     statements1
%   elseif condition2
%     statements2
%   elseif condition3
%     statements3
%   more elseif testing
%     statements4
%   else
%     statements5
%   endif
% Combine into one line
%   if conditions, statements1; end
% The "elseif" part and the "else" part are optional.
% Programming note: naming this file as if-then.m conflicts with MATLAB.
%
% Instructor: Nam Sun Wang
% ----------------------------------------------------------------------

% Start fresh ----------------------------------------------------------
      clear all

% Program header -------------------------------------------------------
      disp ('This program simply tests the sign of a given integer')

% Input an integer -----------------------------------------------------
      i=input('input an integer: ');

% Test the sign of the integer
      if ( i == 0 )
        disp('You have entered a zero.')
      elseif ( i < 0 )
        disp('You have entered a negative integer.')
      else
        disp ('You have entered a positive integer.')
      end