IANN() - Increasing annuities

Calculates the present and future values of an annuity that increases at a constant rate at equal intervals of time. Payments can be made at the beginning or the end of a period.

Returns

Double value if successful. If an error occurs, this function returns a zero.

Arguments

Type	Field	Description
double	dPayment	Periodic payment amount
double	dInt	Annual interest rate
long	lPerYr	Number of payments per year
long	lPer	Number of periods before payment increases
double	dIntIncr	Percentage of each increase
long	lYear	Total number of years
integer	iBasis	Valid values: 0 = present 1 = future

16 bit DLL declarations

PowerBuilder Function declaration

function double IANN(double dPayment, double dInt, long lPerYr, long lPer, double dIntIncr, long lYear, int iBasis) library "IFL16.DLL"

Visual Basic Function declaration

Declare Function IANN lib "IFL16" (ByVal dPayment As Double, ByVal dInt As Double, ByVal lPerYr As Long, ByVal lPer As Long, ByVal dIntIncr As Double, ByVal lYear As Long, ByVal iBasis As Integer) As Double

C/C++ Synopsis

#include "function.h"

double IANN(double dPayment, double dInt, long lPerYr, long lPer, double dIntIncr, long lYear, int iBasis)

32 bit DLL declarations

PowerBuilder Function declaration

function double IANN(double dPayment, double dInt, long lPerYr, long lPer, double dIntIncr, long lYear, int iBasis) library "IFL32.DLL"

Visual Basic Function declaration

Declare Function IANN lib "IFL32" (ByVal dPayment As Double, ByVal dInt As Double, ByVal lPerYr As Long, ByVal lPer As Long, ByVal dIntIncr As Double, ByVal lYear As Long, ByVal iBasis As Integer) As Double

C/C++ Synopsis

#include "function.h"

double IANN(double dPayment, double dInt, long lPerYr, long lPer, double dIntIncr, long lYear, short sBasis)

Example:

dPayment	=	110
dInt	=	0.115	(11.5%)
lPerYr	=	12
lPer	=	12
dIntIncr	=	0.055	(5.5%)
lYear	=	20
iBasis	=	0

Result: $ 14,793.46