Function            FV - calculate the Future Value of a single
                      amount

  Syntax              double FV(double payment, double interest, int
                                periods)

  Prototype in        finance.h

  Remarks             FV calculates the Future Value of a single amount
                      given the present value of the principal, the
                      interest rate per period and the number of periods.

  Return value        returns the future value of a single amount.

  See also            FVa(), PMT(), PV(), PVa()