Operator

Or

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Description

Used to perform a logical Or comparison between two Boolean expressions Or a bitwise Or comparison between two integers.

Usage

result = expression1 Or expression2

Part	Type	Description
result	Boolean or Integer	A Boolean value if expression1 and expression2 are boolean and an integer if expression1 and expression2 are integers.
expression1	Boolean or Integer	Any valid Boolean or integer expression. Expression1 and expression2 must be of the same data type.
expression2	Boolean or Integer	Any valid Boolean or integer expression. Expression1 and expression2 must be of the same data type.

Notes

The Or operator is overloaded. If it is passed two booleans, it performs a logical Or and returns a boolean. If it is passed two integers, it performs a bitwise Or operation on the integers and returns an integer. In this case, it is equivalent to calling the BitOr method of the Bitwise class.

In the first instance, if either boolean expression evaluates to True, then result is True. If both expressions evaluate to False then result is False. The truth table for logical operators is shown below.

Expression1	Expression2	Or	And	Xor
True	True	True	True	False
True	False	True	False	True
False	True	True	False	True
False	False	False	False	False

If you pass two integers, Or returns an integer that is the result of comparing each bit of the two integers passed and assigning 1 to the bit position in the integer returned if either of the bits in the same position in the integers passed are 1. Otherwise, 0 is assigned to the bit position.

The following table shows the results for bitwise operators:

Integer1	Integer2	Or	And	Xor
0	0	0	0	0
0	1	1	0	1
1	0	1	0	1
1	1	1	1	0

Sample code

This example uses the Or operator to perform logical comparisons

Var a As Boolean
Var b As Boolean
Var c As Boolean
Var d As Boolean
a = True
b = False
d = a Or b // d = True
d = b Or c // d = False

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Using Or with Integer values:

Var i1 As Integer = 4
Var i2 As Integer = 5

Var result As Integer
result = i1 Or i2 // result = 5

Compatibility

All project types on all supported operating systems.

See also

And, Not, Xor operators; Bitwise class; Operator Or function; Operator precedence