JavaScript中的年金摊销表

Question

我需要一个函数来帮助您，该函数可以计算按揭年金摊销表，其输出以cols为单位，按月，以下链接所示按月排序的付款金额，本金付款，利息付款等行： 输出示例

输出文件格式应为.cvs。 目前，我被这个女巫困住了，离结果还差得远：

 var i = 5/100; var loanAmount = 15000; var m = 12; var monthlyPayment = loanAmount*(i/12)*Math.pow((1+i/12), m) / (Math.pow((1+i/12), m)-1) var currentBalance = loanAmount; var paymentCounter = 1; var totalInterest = 0; monthlyPayment = monthlyPayment; while(currentBalance > 0) { //this calculates the portion of your monthly payment that goes towards interest towardsInterest = (i/12)*currentBalance; if (monthlyPayment > currentBalance){ monthlyPayment = currentBalance + towardsInterest; } towardsBalance = monthlyPayment - towardsInterest; totalInterest = totalInterest + towardsInterest; currentBalance = currentBalance - towardsBalance; } 

非常感谢您提供任何帮助。

Answer 1

尝试这样的事情：

const annuity = (C, i, n) => C * (i/(1-(1+i)**(-n)));

const balance_t = (C, i, P) => {
  const period_movements = {
    base: C
  }
  period_movements.interest = C*i;
  period_movements.amortization = P - (C*i);
  period_movements.annuity = P;
  period_movements.final_value = Math.round((C - period_movements.amortization)*100)/100;

  return period_movements;
}

const display_mortgage = (C, i, n) => {
  const payements = annuity(C, i, n);
  let movements = balance_t(C, i, payements);
  while (movements.final_value>-.01){
    console.log(movements);
    movements = balance_t(movements.final_value, i, payements);
  }
}

display_mortgage(20000, 0.05, 4);

输出：

{ base: 20000,
  interest: 1000,
  amortization: 4640.236652069255,
  annuity: 5640.236652069255,
  final_value: 15360 }
{ base: 15360,
  interest: 768,
  amortization: 4872.236652069255,
  annuity: 5640.236652069255,
  final_value: 10488 }
{ base: 10488,
  interest: 524.4,
  amortization: 5115.836652069255,
  annuity: 5640.236652069255,
  final_value: 5372 }
{ base: 5372,
  interest: 268.6,
  amortization: 5371.6366520692545,
  annuity: 5640.236652069255,
  final_value: 0 }