exponential to non-exponential value

Question

private void decrypt_Click(object sender, EventArgs e)
      {
          v = Convert.ToDouble (txtencrypt.Text);
           t= Math.Pow(v, d);
           MessageBox.Show(Convert.ToString(t));
           MessageBox.Show(""+t.ToString());
           MessageBox.Show("" + Convert.ToDecimal(n));
           msg = Convert.ToInt16(Math.Pow(v,d) % Convert.ToDouble(n));
           txtdecrypt.Text = Convert.ToString(msg);
      }

/*
this is the code im working now for rsa decryption. the problem im getting is the pow function
return in exponential format, but i need the non exponential format of output.
can any one please help me to find out solution? */

Vulpes · Answer

Here's a simple way in which you can suppress the display of doubles using exponential format: using System; class Test { static void Main() { double d = Math.Pow(10 308); Console.WriteLine(d); string s = ToNonExpFormat(d); Console.WriteLine(s); Console.WriteLine(s.Length); Console.ReadKey(); } static string ToNonExpFormat(double d) { return d.ToString(F99).TrimEnd('0').TrimEnd('.'); } } The output is: 1E+308 10000000000000000000000000000000000000000000000000000000000000000000000000000000 00000000000000000000000000000000000000000000000000000000000000000000000000000000 00000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000 309 However please note the following: 1. This doesn't improve accuracy which is still limited to 15 or 16 significant digits. 2. Very small numbers with exponents less than -99 will be shown as 0. For example: double d = Math.Pow(10 -99); output: 1E-99 0.000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000001 101 But: double d = Math.Pow(10 -100); output: 1E-100 0 1