1. Imports System
Public Class tables
Private a As Integer
Private b As Integer
Private c As Integer
Private v As Integer
Public Sub two()
a = 1
b = 2
While a <= 20
c = a * b
Console.WriteLine(c)
Console.ReadLine()
a = a + 1
End While
End Sub
Public Sub three()
a = 1
b = 3
Do
c = a * b
Console.WriteLine(c)
Console.ReadLine()
a = a + 1
Loop While a <= 20
Exit Sub
End Sub
Public Sub four()
Dim s As Integer
Dim e As Integer
v = 1
s = 1
b = 4
e = 20
For v As Integer = s To e
c = v * b
Console.WriteLine(c)
Console.ReadLine()
v = v + 1
Next v
End Sub
End Class
Module module1
Sub Main()
Dim t As New tables()
Console.WriteLine("enter your choice")
Console.WriteLine("two")
Console.WriteLine("three")
Console.WriteLine("four")
Dim ch As String = Console.ReadLine()
Console.ReadLine()
Select Case ch
Case "two"
t.two()
