Or operator

Used to perform a bitwise disjunction on two expressions.

Syntax:

result = expression1 Or expression2

result

Any numeric variable.

expression1, expression2

Any expressions.

If either or both expressions evaluate to True, result is True. The following table illustrates how result is determined:

If expression1 is	And expression2 is	Then result is
True	True	True
True	False	True
True	Null	True
False	True	True
False	False	False
False	Null	Null
Null	True	True
Null	False	Null
Null	Null	Null

The Or operator performs a bitwise comparison of identically positioned bits in two numeric expressions and sets the corresponding bit in result according to the following table:

If bit in expression1 is	And bit in expression2 is	Then result is
0	0	0
0	1	1
1	0	1
1	1	1

INFO

Or evaluates both operands every time, even when expression1 alone determines the result. Use OrElse for short-circuit evaluation --- for example, when expression2 is expensive, has side effects, or only matters when expression1 is False.

Example

This example uses the Or operator to perform logical disjunction on two expressions.

Dim A, B, C, D, MyCheck
A = 10: B = 8: C = 6: D = Null    ' Initialize variables.
MyCheck = A > B Or B > C    ' Returns True.
MyCheck = B > A Or B > C    ' Returns True.
MyCheck = A > B Or B > D    ' Returns True.
MyCheck = B > D Or B > A    ' Returns Null.
MyCheck = A Or B            ' Returns 10 (bitwise comparison).

See Also

• OrElse operator
• And operator
• Not operator
• Xor operator
• Eqv operator
• Imp operator
• Operators