This operator is used to perform a logical equivalence on two expressions.
result = expression1 Eqv expression2
If either expression is Null, result is also Null. The following table shows how Eqv determines result when neither expression is Null.
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. The following table shows how Eqv determines the corresponding bit.
If the bit in expression1 is |
And the bit in expression2 is |
The result is |
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |