And operator
Used to perform a logical conjunction on two expressions.
Syntax
result = expression1 And expression2
The And operator syntax has these parts:
| Part | Description |
|---|---|
| result | Required; any numeric variable. |
| expression1 | Required; any expression. |
| expression2 | Required; any expression. |
Remarks
If both expressions evaluate to True, result is True. If either expression evaluates to False, result is False. The following table illustrates how result is determined:
| If expression1 is | And expression2 is | The result is |
|---|---|---|
| True | False | False |
| True | Null | Null |
| False | True | False |
| False | False | False |
| False | Null | False |
| Null | True | Null |
| Null | False | False |
| Null | Null | Null |
The And operator also 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 | 0 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
Example
This example uses the And operator to perform a logical conjunction on two expressions.
Dim A, B, C, D, MyCheck
A = 10: B = 8: C = 6: D = Null ' Initialize variables.
MyCheck = A > B And B > C ' Returns True.
MyCheck = B > A And B > C ' Returns False.
MyCheck = A > B And B > D ' Returns Null.
MyCheck = A And B ' Returns 8 (bitwise comparison).
See also
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