internal static FinanceCalcResult <double> Ipmt(double Rate, double Per, double NPer, double PV, double FV = 0, PmtDue Due = PmtDue.EndOfPeriod)
{
double Pmt;
double dTFv;
double dTemp;
if (Due != PmtDue.EndOfPeriod)
{
dTemp = 2d;
}
else
{
dTemp = 1;
}
// Type = 0 or non-zero only. Offset to calculate FV
if ((Per <= 0) || (Per >= NPer + 1))
{
return(new FinanceCalcResult <double>(eErrorType.Value));
}
if (Due != PmtDue.EndOfPeriod && (Per == 1.0))
{
return(new FinanceCalcResult <double>(0d));;
}
// Calculate PMT (i.e. annuity) for given parms. Rqrd for FV
var result = InternalMethods.PMT_Internal(Rate, NPer, PV, FV, Due);
if (result.HasError)
{
return(new FinanceCalcResult <double>(eErrorType.Num));
}
Pmt = result.Result;
if (Due != PmtDue.EndOfPeriod)
{
PV = PV + Pmt;
}
dTFv = InternalMethods.FV_Internal(Rate, (Per - dTemp), Pmt, PV, PmtDue.EndOfPeriod);
return(new FinanceCalcResult <double>(dTFv * Rate));
}
public double GetFv(double Rate, double NPer, double Pmt, double PV = 0, PmtDue Due = PmtDue.EndOfPeriod)
{
return(InternalMethods.FV_Internal(Rate, NPer, Pmt, PV, Due));
}
internal static FinanceCalcResult <double> Fv(double Rate, double NPer, double Pmt, double PV = 0, PmtDue Due = PmtDue.EndOfPeriod)
{
return(new FinanceCalcResult <double>(InternalMethods.FV_Internal(Rate, NPer, Pmt, PV, Due)));
}
