VBScript Variable ScopePritesh
VBScript Variable Scope :
Scope of variable defines the visibility of the variable. Variables having following type of scopes –
|Scope of Variable||Description|
|Dim||Visible at Procedure Level|
|Public||Visible in all procedures|
|Private||Visible in the script|
1. DIM : Procedure Level
- When variable is declared using ‘Dim’ keyword at a Procedure level are available only within the same Procedure.
- When variable is declared using ‘Dim’ keyword at a Script level are available within the same script.
<!DOCTYPE html> <html> <body> <script language="vbscript" type="text/vbscript"> Dim num1 Dim num2 Call sum() Function sum() num1 = 100 num2 = 200 Dim res res = num1 + num2 Msgbox res ' Displays 300 End Function Msgbox num1 ' Displays 100 Msgbox num2 ' Displays 200 Msgbox res ' res is not visible outside procedure </script> </body> </html>
In the above example we have declared two variables at script level so that these two variablesa re visible in procedure as well.
Dim num1 Dim num2
These variables are also referred as global variables. Now we have declared variable ‘res’ at procedure level using DIM then it will not be visible outside the procedure.