FutureValue(IT, PMT, PV, NP)
Last updated August 2, 2001
Version: 1 | Requires: ColdFusion 5 | Library: FinancialLib
Description:
Calculate the future value of investment with regular deposits.
Return Values:
Returns a numeric value.
Example:
Parameters:
| Name | Description | Required |
|---|---|---|
| IT | Interest rate per year (8% = 0.08) | Yes |
| PMT | Number of payments. | Yes |
| PV | Present value. | Yes |
| NP | Number of periods. | Yes |
Full UDF Source:
<cfscript>
/**
* Calculate the future value of investment with regular deposits.
*
* @param IT Interest rate per year (8% = 0.08)
* @param PMT Number of payments.
* @param PV Present value.
* @param NP Number of periods.
* @return Returns a numeric value.
* @author Raymond Thompson (rayt@qsystems.net)
* @version 1, April 23, 2002
*/
function FutureValue(IR,PMT,PV,NP) {
var tpv = abs(pv);
var tnp = abs(np);
var fv = pv;
var tpmt = -abs(pmt);
var tir = abs(ir) / 12;
var scale=0;
if(ArrayLen(Arguments) gt 4) {
scale = 10^abs(Arguments[4]);
}
if (ir eq 0) {
fv = tpv + abs(tpmt * tnp);
} else {
q = (1 + tir)^tnp;
fv = (-pmt + q * pmt + tir * q * tpv) / tir;
}
if (scale NEQ 0) {
fv = int(fv * scale + 0.5) / scale;
}
return(-fv);
}
</cfscript>
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