Operator Andalso (Short Circuit Conjunction)
 
Returns the short circuit-and (conjunction) of two numeric values

Syntax

Declare Operator AndAlso ( ByRef lhs As T1, ByRef rhs As T2 ) As Ret

Usage

result = lhs AndAlso rhs

Parameters

lhs
The left-hand side expression.
T1
Any numeric type.
rhs
The right-hand side expression.
T2
Any numeric type.
Ret
An 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 ValueRhs ValueResult
0-0
100
111


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


Differences from QB

  • This operator was not available in QB.

See also