VBSCRIPT PROCEDURES

• A procedures is a segment of code grouped into a single entity.
• can re-use them.
• By doing so,reduces  the need  to re-type the same code over and over again.
• Once we implement a procedure, we  can use its code by calling that procedure.

Sub procedures:

A Sub procedure can perform some actions, but CANNOT return values.

A Sub procedure is enclosed in Sub and End Sub.

Syntax:

Sub nameOfSubProcedure()

actions to perform

End Sub

Example:

Sub displayText()

 document.write("Here is some text");

End Sub

Using parameters:

Parameters are variables placed inside the parentheses of a sub procedure which are used by the code inside the sub procedure in some way.

 Parameters are separated by commas.

Using parameters with a Sub procedure

Syntax:

Sub nameOfSubProcedure(param1, param2, etc.)

actions to perform

End Sub

Example:

Sub displayName(name)

document.write("Your name is " & name);

 End Sub

Calling a Sub procedure

To call a Sub procedure, refer to the name of the Sub procedure with the Call statement, and pass the appropriate parameter values to it (if there are any).

Syntax:

Call subProcedureToCall()

Example:

Sub printMessage()

document.write("VBScript is a scripting language.")

End Sub

Call printMessage()

Output:

VBScript is a scripting language.