%
% Logical operators return 0 (false) or 1 (true) 
% This is bad programming practice but started with C coding
% back in the 1970's and is embedded in much of numerical
% computing!
%
%
% For A321 course
%
%     Last Modified: Mon 04 Feb 2008, 09:05 AM
%


% Get a simple vector to work with
a = 1:9

a >  4
a <  4
a >= 4
a <= 4

% The next is a test for where a is equal to 4, not to be confused
% with the assignment statement
%      a = 4
% which would reset the 1 x 9 vector a to be the  1 x 1 scalar value 4
a == 4


a ~= 4

% The inequality operator ~= can take the forms
%       !=
%       /=
%       ^=
%      .ne. 
% in other languages, so it's one to check on in each case.
% The others are standard in C, C++, Fortran, Perl, Python, ....