finance_updated 0.1.0 finance_updated: ^0.1.0 copied to clipboard
The fundamental package for financial computing with Dart.
import 'package:finance_updated/finance_updated.dart';
void main(List<String> arguments) {
var Finance = null;
Finance = Finance();
// What is the future value after 30 years of saving $1000 now, with
// an additional monthly savings of $100. Assume the interest rate is
// 7% (annually) compounded monthly?
print(Finance.fv(rate: 0.07 / 12, nper: 30 * 12, pmt: -100, pv: -1000));
// What is the monthly payment needed to pay off a $100,000 loan in 10
// years at an annual interest rate of 2.5%?
print(Finance.pmt(rate: 0.025 / 12, nper: 10 * 12, pv: 100000));
// If you only had $500/month to pay towards the loan, how long would it take
// to pay-off a loan of $10,000 at 3% annual interest?
print(Finance.nper(rate: 0.03 / 12, pmt: -500, pv: 10000));
// What is the amortization schedule for a 1 year loan of $5000 at 10%
// interest per year compounded monthly?
final Iterable<Map<String, num>> payments =
List<int>.generate(12, (int index) => index + 1).map((int per) =>
<String, num>{
'per': per,
'pmt': (Finance.pmt(rate: 0.1 / 12, nper: 1 * 12, pv: 5000) as num),
'ppmt':
(Finance.ppmt(rate: 0.1 / 12, per: per, nper: 1 * 12, pv: 5000)
as num),
'ipmt':
(Finance.ipmt(rate: 0.1 / 12, per: per, nper: 1 * 12, pv: 5000)
as num),
});
payments.forEach(print);
final num interestPaid =
payments.fold(0, (num p, Map<String, num> c) => p + (c['ipmt'] ?? 0));
print(interestPaid);
// What is the present value (e.g., the initial investment) of an investment that
// needs to total $20000 after 10 years of saving $100 every month? Assume the
// interest rate is 7% (annually) compounded monthly.
print(Finance.pv(rate: 0.07 / 12, nper: 10 * 12, pmt: -100, fv: 20000));
// What is the interest rate for a $8,000 loan if the loan term is 5 years and
// and payments are $152.50 monthly?
print(Finance.rate(nper: 60, pmt: -152.5, pv: 8000, fv: 0));
// What is the Internal Rate of return of an investment that requires $15000 deposit now
// and then makes the following withdrawals at regular (fixed)
// intervals: 1500, 2500, 3500, 4500, 6000?. Assuming the ending value is 0.
print(Finance.irr(values: <num>[-15000, 1500, 2500, 3500, 4500, 6000]));
// What is the Net Present Value of an investment that requires $15000 deposit now
// and then makes the following withdrawals at regular (fixed)
// intervals: 1500, 2500, 3500, 4500, 6000?. Assuming the ending value is 0
// and a discount rate of 5%.
print(Finance.npv(
rate: 0.05, values: <num>[-15000, 1500, 2500, 3500, 4500, 6000]));
}