[Up][Next] | Reference for unit 'Math' (#rtl)

## Cash flow functions

The cash flow functions in the math unit resolve the following equation:

    FV + PV * q^n + PMT (q^n - 1) / (q - 1) = 0

In this formula, the following variables are present:

FV
  Future value
PV
  Present value
PMT
  Payment per period
n
  Number of payments (number of periods)
q>
  Interest Rate (return rate)

The financial functions FutureValue, NumberOfPeriods, Payment, PresentValue and InterestRate solve this equation for one of the variables, when the other variables are known.

## See also

FutureValue |  | Calculate the future value of an investment.
NumberOfPeriods |  | Calculate the number of periods for an investment
Payment |  | Calculate the payment for an investment
PresentValue |  | Calculate the present value given the future value of an investment.
TPaymentTime |  | Type used in financial (interest) calculations.