Greatest Common Divisor in Visual Basic NET

A simple program that I wrote using Visual Basic NET to ask the user two numbers and then it will compute the Greatest Common Divisor value.

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Sample Program Output

Program Listing

Public Class Form1

    Public Shared Function GCD(ByVal a As Integer, ByVal b As Integer) As Integer

        If a = 0 Then

            Return b

        End If

        While b <> 0

            If a > b Then

                a -= b

            Else

                b -= a

            End If

        End While

        Return a

    End Function

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

        Dim A As Integer

        Dim B As Integer

        A = Val(TextBox1.Text)

        B = Val(TextBox2.Text)

        Dim gcd_results = GCD(A, B)

        Label3.Text = "The greatest common divisor is " & gcd_results & "."

    End Sub

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

        Label3.Text = ""

        TextBox1.Text = ""

        TextBox1.Focus()

    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

        End

    End Sub

End Class