EQV

result = expr1 EQV expr2

The logical equivalence 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.
* You can use the IMP operator for logical implication.
* For the Microsoft documentation refer to learn.microsoft.com

Debug.Print 1 Eqv 0           '= -2  
Debug.Print 1 Eqv 1           '= -1  
Debug.Print 0 Eqv 1           '= -2  
Debug.Print 0 Eqv 0           '= -1  

Debug.Print True Eqv True     '= True  
Debug.Print True Eqv False    '= False  
Debug.Print False Eqv False   '= True  
Debug.Print False Eqv False   '= True  

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