Operator Andalso (Short Circuit Conjunction)
Returns the short circuit-and (conjunction) of two numeric values
result = lhs AndAlso rhs
lhs
Returns the short circuit-and (conjunction) of the two operands.
This operator evaluates the left hand side expression. If the result is zero, then zero is immediately returned. If the result is non zero then the right hand side is evaluated, and the logical result from that is returned.
The truth table below demonstrates all combinations of a short circuit-and operation, the '-' denotes that the operand is not evaluated.
Short-circuiting is performed - only expressions needed to calculate the result are evaluated.
The return type is always an Integer, of the value 0 or -1, denoting false and true respectively.
This operator cannot be overloaded for user-defined types.
Syntax
Usage
result = lhs AndAlso rhs
Parameters
lhs
The left-hand side expression.
T1Any numeric type.
rhsThe right-hand side expression.
T2Any numeric type.
RetAn Integer.
Return Value
Returns the short circuit-and (conjunction) of the two operands.
Description
This operator evaluates the left hand side expression. If the result is zero, then zero is immediately returned. If the result is non zero then the right hand side is evaluated, and the logical result from that is returned.
The truth table below demonstrates all combinations of a short circuit-and operation, the '-' denotes that the operand is not evaluated.
| Lhs Value | Rhs Value | Result |
| 0 | - | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
Short-circuiting is performed - only expressions needed to calculate the result are evaluated.
The return type is always an Integer, of the value 0 or -1, denoting false and true respectively.
This operator cannot be overloaded for user-defined types.
Example
' Using the ANDALSO operator on two numeric values
Dim As Integer numeric_value1, numeric_value2
numeric_value1 = 15
numeric_value2 = 30
'Result = -1
Print numeric_value1 AndAlso numeric_value2
Sleep
Dim As Integer numeric_value1, numeric_value2
numeric_value1 = 15
numeric_value2 = 30
'Result = -1
Print numeric_value1 AndAlso numeric_value2
Sleep
Differences from QB
- This operator was not available in QB.
See also
