VB.Net Tutorial/Operator/Logical operators

Logical operator: And

<source lang="vbnet">Module Tester

   Sub Main()
     Console.WriteLine("And" & vbCrLf & vbCrLf & _
        "False And False: " & (False And False) & vbCrLf & _
        "False And True: " & (False And True) & vbCrLf & _
        "True And False: " & (True And False) & vbCrLf & _
        "True And True: " & (True And True))
   End Sub 

End Module</source>

And
False And False: False
False And True: False
True And False: False
True And True: True

Logical operator: AndAlso

<source lang="vbnet">Module Tester

   Sub Main()
     Console.WriteLine("AndAlso" & vbCrLf & vbCrLf & _
        "False AndAlso False: " & (False AndAlso False) & _
        vbCrLf & "False AndAlso True: " & _
        (False AndAlso True) & vbCrLf & _
        "True AndAlso False: " & (True AndAlso False) & _
        vbCrLf & "True AndAlso True: " & (True AndAlso True))
   End Sub 

End Module</source>

AndAlso
False AndAlso False: False
False AndAlso True: False
True AndAlso False: False
True AndAlso True: True

Logical operator: Not

<source lang="vbnet">Module Tester

   Sub Main()
     Console.WriteLine("Not" & vbCrLf & vbCrLf & _
        "Not False: " & (Not False) & vbCrLf & "Not True: " & _
        (Not True))
   End Sub 

End Module</source>

Not
Not False: True
Not True: False

Logical operator: Or

<source lang="vbnet">Module Tester

   Sub Main()
     Console.WriteLine("Or" & vbCrLf & _
        vbCrLf & "False Or False: " & (False Or False) & _
        vbCrLf & "False Or True: " & (False Or True) & _
        vbCrLf & "True Or False: " & (True Or False) & _
        vbCrLf & "True Or True: " & (True Or True))
   End Sub 

End Module</source>

Or
False Or False: False
False Or True: True
True Or False: True
True Or True: True

Logical operator: OrElse

<source lang="vbnet">Module Tester

   Sub Main()
     Console.WriteLine("OrElse" & vbCrLf & vbCrLf & _
        "False OrElse False: " & (False OrElse False) & _
        vbCrLf & "False OrElse True: " & (False OrElse True) & _
        vbCrLf & "True OrElse False: " & (True OrElse False) & _
        vbCrLf & "True OrElse True: " & (True OrElse True))
   End Sub 

End Module</source>

OrElse
False OrElse False: False
False OrElse True: True
True OrElse False: True
True OrElse True: True

Logical operator: Xor

<source lang="vbnet">Module Tester

   Sub Main()
     Console.WriteLine("Xor" & vbCrLf & _
        vbCrLf & "False Xor False: " & (False Xor False) & _
        vbCrLf & "False Xor True: " & (False Xor True) & _
        vbCrLf & "True Xor False: " & (True Xor False) & _
        vbCrLf & "True Xor True: " & (True Xor True))
   End Sub 

End Module</source>

Xor
False Xor False: False
False Xor True: True
True Xor False: True
True Xor True: False

Use Logic operator Or to link two functions

<source lang="vbnet">Module LogicTest

   Sub Main()
       Dim x As Integer = 1
       Dim y As Integer = 1
       If A(x) Or B(y) Then
           Console.WriteLine("x= " & CStr(x) & ", y = " & CStr(y))
       End If
       If A(x) OrElse B(y) Then
           Console.WriteLine("x= " & CStr(x) & ", y = " & CStr(y))
       End If
   End Sub
   Function A(ByVal v1 As Integer) As Boolean
       Return True
   End Function
   Function B(ByVal v1 As Integer) As Boolean
       Return True
   End Function

End Module</source>

x= 1, y = 1
x= 1, y = 1

Use logic operators in If statement: Not, And, Or

<source lang="vbnet">Module Module1

   Sub Main()
       Dim A As Boolean = False
       Dim B As Boolean = True
       Dim C As Boolean = True
       If (Not A) Then
           Console.WriteLine("Not A")
       End If
       If (B Or C) Then
           Console.WriteLine("B Or C")
       End If
       If (B And C) Then
           Console.WriteLine("B And C")
       End If
   End Sub

End Module</source>

Not A
B Or C
B And C