This document provides an overview of VBScript concepts including: - Variables, arrays, functions, conditional statements, and looping statements are introduced. - The agenda covers variable declaration, array usage, function parameters, if/else conditional syntax, and for/while loop structures. - Examples are given for common VBScript elements like variables, functions, if/else statements, and for loops to illustrate proper syntax and usage.

1. Quality Assurance /
Software Testing Training
VBScript

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Agenda
• Overview of VB Script
• Variables
• Rules for Declaring Variables
• Option Explicit
• Comments
• Arrays
• Functions
• Calling a Function
• Function Parameters and return
• Sub Procedures
• Types of Conditional Statements
• Types of Looping Statements
• Loop Control Statements

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• VBScript (Visual Basic Script) is a general-purpose, lightweight and
active scripting language developed by Microsoft that is modelled
on Visual Basic.
• As it a scripting language, it is not actually compiled but
INTERPRETED!
• VBScript, for the most part, is case insensitive. It has a very simple
syntax, easy to learn and to implement.
• It uses Component Object Model (COM) in order to access the
elements of the environment in which it is executing.
Overview of VB Script

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• UFT is using VBScript as a scripting language
• VBScript is used for Client side scripting in Microsoft Internet
Explorer.
Overview of VB Script

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• Open a text editor (Notepad)
• Enter the code:
msgbox “Hello World”
• The msgbox function displays a message box and waits for the user
to click a button and then an action is performed based on the
button clicked by the user.
• Save it as My Script.vbs
• Double click on My Script.vbs to execute the code – A popup
message with the text “Hello World” appears.

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• Variable is a named memory location used to hold a value.
• VBScript has only ONE fundamental data type - Variant.
• Because of this you can store different types of data in VB easily
unlike other languages where you need to declare the variable
type like Integer, Decimal etc.
• Variables are declared using “dim” keyword
• dim [variable_name]
• Ex: dim a

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Variables
• Variable Name must begin with an alphabet.
• Variable names cannot exceed 255 characters
• Variables Should NOT contain a period(.)
• Variable Names should be unique in the declared context.
• Eg. Dim Employee
• Dim Unit99
• Dim Student_Age
• Dim 99Unit
• Dim student.age

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• The numeric values should be declared without double quotes.
a=10
• The String values should be enclosed within double quotes(")
a=“My Script”
• Date and Time variables should be enclosed within hash symbol(#)
a=#27/6/2016#
a=#04:30:44 PM#
Rules for Declaring Variables

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• Since VB is a loosely typed language just like other scripting
languages
• Loosely typed – Using a variable just by assigning a value alone .
Declaration is not mandatory.
• Note : It is always a good practice to declare variables & use it. This
makes your code more READABLE
Rules for Assigning Values to Variables

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• Option Explicit – is enforces “Variable Declaration”.
• If the first line of your code has “Option Explicit”, then all variables
that are to be used in the code should be explicitly declared.
• After that you can assign a value to them.
Option Explicit
dim a
a=10
• Invalid:
Option Explicit
a=10
Option Explicit

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• Comments are used to mark a piece of code so that it doesn't get
executed.
• The apostrophe is the special character VBScript uses as its
comment initiator.
• VB Script supports only ‘single line comments’ & does not support
“multi line comments”
• Example:
Option Explicit
dim myText ‘Variable declaration
myText=“Good Evening” ‘Assigning value
Msgbox myText ‘printing out the message to user
Comments

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• Arrays can hold more than one value in a single variable at a time.
• Unlike most conventional languages, VBScript Arrays can store any
type of variable in an array. Hence, an array can store an integer,
string or characters in a single array variable.
Arrays

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• Method 1 : Using Dim
dim arr1() 'Without Size
• Method 2 : Mentioning the Size
dim arr2(4) 'Declared with size of 4
• Array index will be starting from 0 (ZERO)
• Array Index Cannot be Negative.
• Method 3 : using 'Array' Parameter
dim arr3
arr3 = Array("apple","Orange","Grapes")
• The values are assigned to the array by specifying array index value
against each one of the values to be assigned. It can be a string.
dim arr(3)
arr(0) = 1 'Number
arr(1) = "VBScript“ 'String
Array Declaration

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Functions
• A function is a group of reusable code which can be called
anywhere in your program.
• This will enable programmers to divide a big program into a
number of small and manageable functions..
• Apart from inbuilt Functions, VBScript allows us to write user-
defined functions as well
• Basic Syntax:
Function Functionname(--parameter-list--)
statement 1
statement 2
………
statement n
End Function

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Calling a Function
• To invoke a function somewhere later in the script, you would
simple need to write the name of that function with
the Call keyword.
• Example:
Function Greeting()
Msgbox “Hi there!”
End Function
Call Greeting()

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Function Parameters and return
• Parameters can pass to the functions, which will be an input entry
to the function
• Function also can return some value back to the calling function,
this will be output from the function
• Example:
Dim a
a=“Mark”
msgbox Greeting(a) ‘Variable a is the input parameter here
Function Greeting(name)
Greeting = “Hi ”&name
End Function

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Sub Procedures
• Sub Procedures are similar to functions but there are few
differences.
• Sub procedures DONOT Return a value while functions may or may
not return a value.
• Sub procedures are called without call keyword
• Sub procedures are always enclosed within Sub and End Sub
statements.
• Basic Syntax:
Sub Procedurename(--parameter-list--)
statement 1
statement 2
statement n
End Sub

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Calling a Sub Procedure
• To invoke a Sub Procedure somewhere later in the script, you
would simple need to write the name of that Sub Procedure
without Call keyword.
• Sub procedure can also have parameters like function
• Example:
Sub Greeting()
Msgbox “Hi there!”
End Sub
Greeting() ‘calling a sub procedure

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Types of Conditional Statements
• if statement - consists of a Boolean expression followed by one or
more statements.
Syntax:
if (condition=true) Then
[conditional Statements]
End If
• if..else statement consists of a Boolean expression followed by one
or more statements. If the condition is True, the statements under
If statements are executed. If the condition is false, Else part of the
script is Executed

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Types of Conditional Statements
Syntax:
if (condition=true) Then
[conditional Statements_1]
Else
[conditional Statements_2]
End If
• if...elseif..else statement - An if statement followed by one or
more ElseIf Statements, that consists of boolean expressions and
then followed by an optional else statement, which executes when
all the condition becomes false.
Syntax:
if (condition=true) Then
[conditional Statements_1]
Elseif (Cndition = true) then
[conditional Statements_2]
Else
[default Conditional Statement]
End If

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Types of Conditional Statements
• nested if statements - An if or elseif statement inside another if or
elseif statement(s).
• switch statement - A switch statement allows a variable to be
tested for equality against a list of values.
Syntax:
Select Case expression
Case expressionlist1
[Statements]
Case expressionlist2
[Statements]
Case Else
[Default Statements]
End Select

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Types of Looping Statements
• for loop - Executes a sequence of statements multiple times and
abbreviates the code that manages the loop variable.
Syntax:
for counter=start to end [step count]
[Statements]
Next

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Types of Looping Statements
• for ..each loop - This is executed if there is at least one element in
group and reiterated for each element in a group.
Syntax:
for each element in group
[Statements]
Next
• while..wend – loop - This tests the condition before executing the
loop body.
Syntax:
while (condition is true)
[Statements]
wend

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Types of Looping Statements
• do..while loops - The do..While statements will be executed as long
as condition is True.(i.e.,) The Loop should be repeated till the
condition is False.
Syntax:
Do while (condition is true)
[Statements]
Loop

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Types of Looping Statements
• do..until loops - The do..Until statements will be executed as long
as condition is False.(i.e.,) The Loop should be repeated till the
condition is True.
Do Until (condition is false)
[Statements]
Loop

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Loop Control Statements
• Loop control statements change execution from its normal
sequence. When execution leaves a scope, all the remaining
statements in the loop are NOT executed.
• Exit For statement - Terminates the For loop statement and
transfers execution to the statement immediately following the
loop
• Exit Do statement - Terminates the Do While statement and
transfers execution to the statement immediately following the
loop

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Question?

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