Math.E (C#)
<%@ page Language="c#" runat="server" %> <script language="c#" runat="server"> void Page_Load() { pi.Text = Math.PI.ToString(); exp.Text = Math.E.ToString(); } void Update(object sender, EventArgs e) { try { double dblInput = Convert.ToDouble(input.Text); sqrt_input.Text = dblInput.ToString(); sqrt_result.Text = Math.Sqrt(dblInput).ToString(); abs_input.Text = dblInput.ToString(); abs_result.Text = Math.Abs(dblInput).ToString(); log_input.Text = dblInput.ToString(); log_result.Text = Math.Log10(dblInput).ToString(); } catch { sqrt_result.Text = ""; abs_result.Text = ""; log_result.Text = ""; errormessage.Text = "Error occurred in input"; } } </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 /> <asp:label id="errormessage" runat="server" /><br /> </body> </html>