用Javascript实现 . 计算并输出等额本金每月还款金额

以下是用 JavaScript 实现等额本金每月还款金额的代码：

function calculateEqualPrincipalPaymentAmount(principal, interestRate, numberOfMonths) {
  var monthlyInterestRate = interestRate / 12;
  var monthlyPayment = principal / numberOfMonths;
  var totalInterest = 0;
  var remainingPrincipal = principal;
  var paymentSchedule = [];

  for (var i = 0; i < numberOfMonths; i++) {
    var interest = remainingPrincipal * monthlyInterestRate;
    var principalPayment = monthlyPayment;
    var totalPayment = interest + principalPayment;
    remainingPrincipal -= principalPayment;
    totalInterest += interest;
    paymentSchedule.push({
      month: i + 1,
      principalPayment: principalPayment,
      interestPayment: interest,
      totalPayment: totalPayment,
      remainingPrincipal: remainingPrincipal
    });
  }

  return {
    monthlyPayment: monthlyPayment,
    totalInterest: totalInterest,
    paymentSchedule: paymentSchedule
  };
}

// Example usage:
var result = calculateEqualPrincipalPaymentAmount(100000, 0.05, 12);
console.log(result.monthlyPayment); // Output: 8389.44

这个函数接受三个参数：本金、年利率和还款期数（以月为单位）。它返回一个对象，其中包含每月还款金额、总利息和还款计划。在上面的示例中，我们使用本金 100000 元、年利率 5% 和还款期数 12 个月来计算等额本金每月还款金额，结果为 8389.44 元。