Introducing Do While & Do Until Loops & Repetition Statements Tutorial 9 Introducing Do While & Do Until Loops & Repetition Statements

Do While Loop Do While [condition] action(s) Loop intCounter = 0 Do While (intCounter < 10) intSumOfNumbersUpto10 += intCounter intCounter += 1 Continue 

Repeats the actions as long as the condition is true The condition must change, otherwise infinite loop will occur. Within the loop add code(s) to change the condition that eventually become false

Do Until Loop Do Until [condition] action(s) Loop intCounter = 0 Do Until (intCounter >= 10) intSumOfNumbersUpto10 += intCounter intCounter += 1 Continue 

Repeats the actions as long as the condition is false The condition must change, otherwise infinite loop will occur. Within the loop add code(s) to change the condition that eventually become true

Coding with ListBox Remove items in the ListBox lstStudents.Items.Clear( ) Class.SubClass.Behavior or Add items to the ListBox lstStudents.Items.Add (“Name” & ControlChars.Tab & ControlChars.Tab & “Course”)

Example Dim intCounter As Integer = 1 Dim intSumOfNumbersUpto10 As Integer = 0 Do While (intCounter < 10) intSumOfNumbersUpto10 += intCounter lstNumbersUpto10.Items.Add(“Number “ & intCounter & ControlChars.Tab & intSumOfNumbersUpto10) intCounter += 1 Loop