XOR

result = expr1 XOR expr2

The logical exclusion operator.

expr1	The first expression evaluating to either True or False (Boolean)
expr2	The second expression evaluating to either True or False (Boolean)

REMARKS

* This is an Operator.
* The result is True only if one (and only one) evaluate to True.
* You can use the AND operator for logical and.
* You can use the NOT operator for logical not.
* You can use the OR operator for logical or.
* For the Microsoft documentation refer to learn.microsoft.com

Debug.Print True Xor True         '= False  
Debug.Print True Xor False        '= True  
Debug.Print False Xor False       '= False  
Debug.Print False Xor True        '= True  
Debug.Print (1 = 2) Xor (1 = 1)   '= True  
Debug.Print 1 = 2 Xor 1 = 1       '= True  
Debug.Print 1 Xor 0               '= 1  
Debug.Print 1 Xor -1              '= -2  

Debug.Print True Xor Null         '= Null  
Debug.Print Null Xor True         '= Null  
Debug.Print False Xor Null        '= Null  
Debug.Print Null Xor False        '= Null  
Debug.Print Null Xor Null         '= Null