VBScript ByVal Parameters


What are ByVal Parameters?

If ByVal is specified, then the arguments are sent as byvalue when the function or procedure is called.

Example :

<!DOCTYPE html>
<script language="vbscript" type="text/vbscript">

Function fnadd(Byval num1, Byval num2)
   num1 = 4
   num2 = 5
End Function
 Dim x,y
 res= fnadd(x,y)
 document.write("The value of x is " & x & "<br />")
 document.write("The value of y is " & y & "<br />")

The above function takes the parameter x and y as by values. Hence, after executing the function, the values are unchanged.

If the above function is saved as .html and executed in IE, the output would be as follows:

The value of x is 6
The value of y is 4