Use math function: Math.PI (VB.net)

<%@ page language="vb" runat="server" %>

<script runat="server">
  Sub Page_Load()
    pi.text = Math.PI
    exp.text = Math.E
  End Sub

  Sub Update(Sender As Object, E As EventArgs)
    Dim dblInput As Double = CDbl(input.text)

    sqrt_input.text = dblInput
    sqrt_result.text = Math.Sqrt(dblInput)
 
    abs_input.text = dblInput
    abs_result.text = Math.Abs(dblInput)
 
    log_input.text = dblInput
    log_result.text = Math.Log10(dblInput)
  End Sub
</script>

<html>
  <body>
    <hr />
    Pi = <asp:label id="pi" runat="server" /><br />
    Exponential Constant = <asp:label id="exp" runat="server" />
    <hr />

    <form runat="server">
    Input = <asp:textbox id="input" runat="server" />
    <asp:button text="Submit" runat="server" onclick="update" />
    </form><hr />

    Square root of <asp:label id="sqrt_input" runat="server"/>
    = <asp:label id="sqrt_result" runat="server" /><br />

    Absolute Value of <asp:label id="abs_input" runat="server"/>
    = <asp:label id="abs_result" runat="server" /><br />

    Logarithm of <asp:label id="log_input" runat="server"/>
    = <asp:label id="log_result" runat="server" /><br />

  </body>
</html>

Related examples in the same category

1.	Math.Sqrt (VB.net)
2.	Math.Abs (VB.net)
3.	Math.Log10 (VB.net)
4.	Math.E (VB.net)
5.	Math.PI (C#)
6.	Math.E (C#)
7.	Math.Abs (C#)

Use math function: Math.PI (VB.net) : Math « Development « ASP.Net

Related examples in the same category