Created by Alia Al-Abdulkarim 2008 Visual Basic Vs. Java

Created by Alia Al-Abdulkarim 2008 Variables Dim a As Double = 3.0 Dim b As Double = 4.0

Created by Alia Al-Abdulkarim 2008 Loops While Loop While (i <> limit) sum += i i+=1 End While

Created by Alia Al-Abdulkarim 2008 Loops cont. For Loop For i = 1 To 5 Step Next

Created by Alia Al-Abdulkarim 2008 Select Case Select Case (choice) Case Case Case Case Else End Select

Created by Alia Al-Abdulkarim 2008 Visual Basic Visual Basic Functions and Subs Scopes Events

Created by Alia Al-Abdulkarim 2008 Functions and Subs Function Piece of code that is executed upon a function call. Always returns a value May receive parameters Sub Same as function, but it doesn’t return a value

Created by Alia Al-Abdulkarim 2008 Functions and Subs cont. Function function-name (ByVal Para1 As data-type, ……..) As data-type Return variable End Function

Created by Alia Al-Abdulkarim 2008 Functions and Subs Cont. Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Function function-name (ByVal Para1 As data-type, ……..) As data-type Return variable End Function End Sub Functions’ Definitions Can Not Be Nested

Created by Alia Al-Abdulkarim 2008 Scopes Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim A As Integer End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click A = 10 End Sub Variable Declaration isn’t visible here

Created by Alia Al-Abdulkarim 2008 Events When do we use them? Example When I want the value in the textbox printed on a label after the button is clicked, I create an Event that reads from the textbox and writes on a label Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim var As String var = TextBox1.Text Label1.Text = var End Sub

Created by Alia Al-Abdulkarim 2008 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim a As Integer = 0 End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click TextBox1.Text = a End Sub Quiz: What is the Problem? Variable Declaration isn’t visible here