Nested If Then Else Statement

Nested If..Then..Else statement is used to check multiple conditions using if then else statements nested inside one another.

Syntax:
If [Condition] Then
   If [Condition] Then
     [Statements]
   Else
     [Statements]
Else
   [Statements]

In the above syntax when the Condition of the first if then else is true, the second if then else is executed to check another two conditions. If false the statements under the Else part of the first statement is executed.

Example:
 Private Sub Button1_Click(ByVal sender As System.Object,
      ByVal e As System.EventArgs) Handles Button1.Click
    If Val(TextBox1.Text) >= 40 Then
       If Val(TextBox1.Text) >= 60 Then
          MsgBox("You have FIRST Class")
       Else
          MsgBox("You have SECOND Class")
       End If
    Else
       MsgBox("Check your Average marks entered")
    End If
 End Sub