VBScript Procedures

VBScript can use two kinds of procedures:

  • Sub procedures
  • Function procedures

VBScript Sub Procedures

Sub procedure:

  • is a series of statements, enclosed by Sub and End Sub statements
  • can perform some actions, butdoes not return a valueValue
  • can take parameters
Sub mysub()
some statements
End Sub

or

Sub mysub(argument1,argument2)
some statements
End Sub

Example (IE only)

Sub mysub()
document.write("I was written by a sub procedure")
End Sub

Try it Yourself »

VBScript Function Procedures

Function procedure:

  • is a series of statements, enclosed by Function and End Function statements
  • can perform some actions, andreturns a valueValue
  • can take parameters passed to it by calling the procedure.
  • If there are no parameters, it must have empty parentheses ()
  • By assigning a value to the function procedure name, it can return a value
Function myfunction()
some statements
myfunction=some value
End Function

or

Function myfunction(argument1,argument2)
some statements
myfunction=some value
End Function

Example (IE only)

function myfunction()
myfunction=Date()
end function

Try it Yourself »

Calling a Procedure

This simple function procedure is called to calculate the sum of two parameters:

Example (IE only)

Function myfunction(a,b)
myfunction=a+b
End Function

document.write(myfunction(5,9))

Try it Yourself »

The function "myfunction" returns the sum of parameter "a" and parameter "b". Here it returns 14.

When you call a procedure, you can use the Call statement, as shown below:

Call MyProc(argument)

Or, you can omit the Call statement, as shown below:

MyProc argument

Other Extensions