Not operator
Used to perform bitwise negation on an expression.
Syntax:
result = Not expression
- result
- Any numeric variable.
- expression
- Any expression.
The following table illustrates how result is determined:
| If expression is | Then result is |
|---|---|
| True | False |
| False | True |
| Null | Null |
The Not operator inverts the bit values of its operand and sets the corresponding bit in result according to the following table:
| If bit in expression is | Then bit in result is |
|---|---|
| 0 | 1 |
| 1 | 0 |
Example
This example uses the Not operator to perform logical negation on an expression.
vb
Dim A, B, C, D, MyCheck
A = 10: B = 8: C = 6: D = Null ' Initialize variables.
MyCheck = Not (A > B) ' Returns False.
MyCheck = Not (B > A) ' Returns True.
MyCheck = Not (C > D) ' Returns Null.
MyCheck = Not A ' Returns -11 (bitwise comparison).