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Math Functions in Visual Basic .Net

Math Functions in Visual Basic .Net
Math function included in this sample vb.net program are the following; pi, square root, and power of 2.

The program will let you enter a number then the program will get its square root and raise that number to the power of 2.

Source code:

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If TextBox1.Text = "" Or IsNumeric(TextBox1.Text) = False Then
            MessageBox.Show("Please enter a number")
            TextBox1.Focus()
        Else
            Label3.Text = Math.PI * Val(TextBox1.Text)
            Label4.Text = Math.Pow(TextBox1.Text, 2)
            Label6.Text = Math.Sqrt(TextBox1.Text)
        End If
    End Sub
End Class