Xor operator
Used to perform a logical exclusion on two expressions.
Syntax
[ result = ] expression1 Xor expression2
The Xor operator syntax has these parts:
Part | Description |
---|---|
result | Optional; any numeric variable. |
expression1 | Required; any expression. |
expression2 | Required; any expression. |
Remarks
If one, and only one, of the expressions evaluates to True, result is True. However, if either expression is Null, result is also Null.
When neither expression is Null, result is determined according to the following table.
If expression1 is | And expression2 is | Then result is |
---|---|---|
True | True | False |
True | False | True |
False | True | True |
False | False | False |
The Xor operator performs as both a logical and bitwise operator. A bitwise comparison of two expressions using exclusive-or logic to form the result, is shown in 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 | 0 |
Example
This example uses the Xor operator to perform logical exclusion on two expressions.
Dim A, B, C, D, MyCheck
A = 10: B = 8: C = 6: D = Null ' Initialize variables.
MyCheck = A > B Xor B > C ' Returns False.
MyCheck = B > A Xor B > C ' Returns True.
MyCheck = B > A Xor C > B ' Returns False.
MyCheck = B > D Xor A > B ' Returns Null.
MyCheck = A Xor B ' Returns 2 (bitwise comparison).
See also
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