Uppercase vs lowercase clarification

[tcab]

Thank you Cyrille - very helpful!

Am still curious why 'NOT' could not be expressed as 'not' ? Its arguably neither variable nor function - an operator, I'd say. So perhaps operators are case sensitive. In fact when I type 'and' into the home screen it auto converts to uppercase AND, supporting the case for uppercase operators. On the other hand, I seem to be able to use lowercase 'and' in a program e.g.

Code:


EXPORT test1()
BEGIN
  return NOT (1 and 0);
END;

So amongst operators, 'NOT' is case sensitive yet 'AND' is not case sensitive?
'BITNOT' is not case sensitive either and seems ok expressed as 'bitnot'. Is 'NOT' an exception?

I haven't checked any other operators yet - pending any more comments/thoughts.