計算數字為2的？次方或求2的n次方 程式碼

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim n As Integer

        n = TextBox1.Text

        Label1.Text = 2 ^ TextBox1.Text

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        Dim m As Integer

        m = TextBox2.Text

        Dim ans As Integer

        Do Until m = 1

            ans += 1

            m /= 2

        Loop

        Label2.Text = ans

    End Sub

End Class