Process  
-- Explanation
---- When Compiled

=  -- Equal to
/= -- Not equal to
---- Exactly what you would expect


<   --  Less than
<=  --  … or equal to
>   --  Greater than
>=  --  … or equal to
----  If not a number, works on the order of definition.
----  false < true >>> true

in
not in          
--  Type Membership

--  Range membership
A in -10..10
A in 1 | 4 | 8;