VB.NET provides 3 decision statement

1. If ..then

Syntax:
If Expression1 Then
‘This statement block is executed if Expression1 is true
End If


2. If..then..else

Syntax:
If Expression1 Then
‘This statement block is executed if Expression1 is true
Else
‘This statement block is executed if Expression1 is
false
End If

3. Select..Case

Syntax:
Select Expression1
case 1
‘ statement block for case 1
case 2
‘ statement block for case 2
case n
‘ statement block for case n
case Else
‘ statement block if none of the case match
End Select

1. While

Syntax:
While Expression
  Statement block
End While
Dim Counter As Integer = 0
Dim Number As Integer = 10
While Number > 6
Number = Number – 1
Counter = Counter + 1
End While




Example:
Dim Counter As Integer = 0
Dim Number As Integer = 10
While Number > 6
Number = Number – 1
Counter = Counter + 1
End While



2. Do..Loop

Syntax:
Do
   Statement Block
Loop While Expression




Example:
Dim Counter As Integer =0
Dim Number As Integer =10
Do While Number > 6
Number = Number - 1
Counter = Counter + 1
Loop



3. For..Next

Syntax:
For Loop Counter = Start Value To End Value [Step value]
   ‘statement block
Next [Loop Counter]


Example:
Dim J, Total As Integer
For J = 2 To 10 Step 2
Total = Total + J
Next J

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