'Learn how to use a Do While Loop.

Public Class Form1
    Inherits System.Windows.Forms.Form

    Private Sub Form1_Load(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles MyBase.Load
        'display the numbers from 0 to 9
        Dim i As Integer

        'method 1
        Do While (i < 10)
            TextBox1.Text = TextBox1.Text & i & ","
            i = i + 1
        Loop

        i = 0 ' reset i

        'method 2
        Do
            TextBox2.Text = TextBox2.Text & i & ","
            i = i + 1
        Loop While (i < 10)
    End Sub

End Class

' Let us take a closer look at our do while loop:
'----------------------------------------------------------------
'    Do While (i < 10)
'        TextBox1.Text = i
'        i = i + 1
'    Loop
'----------------------------------------------------------------
' Do While - do while loop

' i < 10   - loop while i less than 10

' i=i+1    - increment o

' Loop     - loop while i less than 10
'----------------------------------------------------------------
'Description:
'Loop until argument is set.
'Warning! The do while loop can crash your program if "done wrong".
'-----------------------------------------------------------------------------