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Calculate the present value given the future value of an investment.
Source position: math.pp line 623
function PresentValue( 
ARate: Float; 
NPeriods: Integer; 
APayment: Float; 
AFutureValue: Float; 
APaymentTime: TPaymentTime 
):Float; 
PresentValue calculates the present (start) value of an investment (PV) in the cash flow formula (see CashFlowFunctions) The function result is the start value of an investment, when the future value is AFutureValue (FV) and APayment (PMT) is invested for NPeriods (n) at the rate of ARate (q) per period.
The APaymentTime parameter determines whether the investment (payment) is an ordinary annuity or an annuity due: ptEndOfPeriod must be used if payments are at the end of each period. If the payments are at the beginning of the periode, ptStartOfPeriod must be used.

Calculate the future value of an investment. 


Calculate the interest rate value of an investment 


Calculate the number of periods for an investment 


Calculate the payment for an investment 


Type used in financial (interest) calculations. 


Cash flow functions 