C# Math E

Description

Math E represents the natural logarithmic base, specified by the constant, e.

Syntax

Math.E has the following syntax.


public const double E

Example

The following example compares E with the value calculated from a power series.


//from   w ww  . ja  v a  2  s .c  om
// Example for the Math.E field. 
using System;

class EField 
{
    public static void Main() 
    {
        double factorial = 1.0;
        double PS = 0.0;

        for( int n = 0; n < 90 && Math.Abs( Math.E - PS ) > 1.0E-15; n++ )
        {
            // Calculate a running factorial. 
            if( n > 0 )
                factorial *= (double)n;

            // Calculate and display the power series.
            PS += 1.0 / factorial;
            Console.WriteLine( PS);
            Console.WriteLine(Math.E - PS );
        }
    }
}

The code above generates the following result.