Eqv operator

Used to perform a bitwise equivalence on two expressions --- the logical inverse of Xor.

Syntax:

result = expression1 Eqv expression2

result

Any numeric variable.

expression1, expression2

Any expressions.

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	The result is
True	True	True
True	False	False
False	True	False
False	False	True

The Eqv 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	The result is
0	0	1
0	1	0
1	0	0
1	1	1

INFO

Eqv always evaluates both operands.

Example

This example uses the Eqv operator to perform logical equivalence on two expressions.

Dim A, B, C, D, MyCheck
A = 10: B = 8: C = 6: D = Null    ' Initialize variables.
MyCheck = A > B Eqv B > C         ' Returns True.
MyCheck = B > A Eqv B > C         ' Returns False.
MyCheck = A > B Eqv B > D         ' Returns Null.
MyCheck = A Eqv B                 ' Returns -3 (bitwise comparison).

See Also

• Xor operator
• Imp operator
• And operator
• Or operator
• Operators