Example: Future Value of an Investment

A couple starts setting aside $30,000 a year when they are 45 years old. They expect to earn 5% interest on the money compounded yearly. The future value of the investment is computed for a 20 year period. 
using System;
using Imsl.Finance;

public class fvEx1
{
    public static void  Main(String[] args)
    {
        double rate = .05;
        int nper = 20;
        double payment = - 30000.00;
        double pv = - 30000.00;
        
        double fv = Finance.Fv(rate, nper, payment, pv, 
                               Finance.Period.AtBeginning);
        Console.Out.WriteLine("After 20 years, the value of the " +
                              "investments " + "will be " + 
                              fv.ToString("C"));
    }
}

Output

After 20 years, the value of the investments will be $1,121,176.49
Link to C# source.