Question

I came across a bug in some VB6 code this morning which wasn’t evaluating correctly. The code is in the following format:

<Boolean Value 1> Or <Boolean Value 2> And <Boolean Value 3>

The fix (in this case) was to put parentheses in as follows:

(<Boolean Value 1> Or <Boolean Value 2>) And <Boolean Value 3>

Because the And was being incorrectly evaluated first so my question is – Is this always the case?

I assume that things like + – * are evaluated using the BIDMAS rule but what about these operators And Or Not XOr Is <> etc

Answer 1

Operator Precedence in Visual Basic

Precedence in order of appearance:

Negation (Not)

Conjunction (And, AndAlso)

Inclusive disjunction (Or, OrElse)

Exclusive disjunction (Xor)