VBScript Logical Operators


Advertisements

VBScript supports the following logical operators −

Assume variable A holds 10 and variable B holds 0, then −

Operator Description Example
AND Called Logical AND operator. If both the conditions are True, then Expression becomes True. a<>0 AND b<>0 is False.
OR Called Logical OR Operator. If any of the two conditions is True, then condition becomes True. a<>0 OR b<>0 is true.
NOT Called Logical NOT Operator. It reverses the logical state of its operand. If a condition is True, then the Logical NOT operator will make it False. NOT(a<>0 OR b<>0) is false.
XOR Called Logical Exclusion. It is the combination of NOT and OR Operator. If one, and only one, of the expressions evaluates to True, result is True. (a<>0 XOR b<>0) is true.

Example

Try the following example to understand all the Logical operators available in VBScript −

<!DOCTYPE html>
<html>
   <body>
      <script language = "vbscript" type = "text/vbscript">
         Dim a : a = 10
         Dim b : b = 0 
         Dim c

         If a<>0 AND b<>0 Then                    
            Document.write ("AND Operator Result is : True")
            Document.write ("<br></br>")  'Inserting a Line Break for readability
         Else
            Document.write ("AND Operator Result is : False")
            Document.write ("<br></br>")  'Inserting a Line Break for readability
         End If

         If a<>0 OR b<>0 Then
            Document.write ("OR Operator Result is : True")
            Document.write ("<br></br>")
         Else
            Document.write ("OR Operator Result is : False")
            Document.write ("<br></br>") 
         End If

         If NOT(a<>0 OR b<>0) Then
            Document.write ("NOT Operator Result is : True")
            Document.write ("<br></br>") 
         Else
            Document.write ("NOT Operator Result is : False")
            Document.write ("<br></br>") 
         End If

         If (a<>0 XOR b<>0) Then
            Document.write ("XOR Operator Result is : True")
            Document.write ("<br></br>") 
         Else
            Document.write ("XOR Operator Result is : False")
            Document.write ("<br></br>") 
         End If
      </script>
   </body>
</html>

When you save it as .html and execute it in Internet Explorer, then the above script will produce the following result −

AND Operator Result is : False

OR Operator Result is : True

NOT Operator Result is : False

XOR Operator Result is : True
vbscript_operators.htm
Advertisements