我正在尝试制作一个 javascript 贷款计算器程序。我似乎无法让我的循环在每行上放置不同的数字。它应该显示从 24 个月、36 个月、48 个月和 60 个月开始还清的金额。我使用一个函数来进行计算，但我总是得到 24 个月的结果。我知道你必须将 nummonths 更改为 36、48 和 60，但我不知道该怎么做。我以为每次循环都会增加 12 个月。另外，您如何将数字格式化为货币？最后我得到了一个很长的数字。我尝试在calculate()上执行parseFloat，但出现错误。 这是我的代码:
<html>
<BODY BGCOLOR="#FFC0CB">
<head>
<title>Chapter 6 Assignment 2</title>
</head>
<body>
<h1>Loan Calculator</h1>
<script type="text/javascript">
var vehicleprice = window.prompt("What is the vehicle price?", "");
var downpayment = window.prompt("What is the amount of the down payment?", "");
var annualinterest = window.prompt("What is the annual interest rate for the loan?", "");
var nummonths = 24
var loanamount = vehicleprice - downpayment
var monthlyinterest = annualinterest / 1200
vehicleprice = parseFloat(vehicleprice).toFixed(2);
downpayment = parseFloat(downpayment).toFixed(2);
loanamount = parseFloat(loanamount).toFixed(2);
function calculate()
{
var baseamount = Math.pow(1 + monthlyinterest, nummonths );
return loanamount * monthlyinterest / (1 - (1/baseamount));
}
document.write("Vehicle price: $" +vehicleprice+ "<br>");
document.write("Down payment: $" +downpayment+ "<br>");
document.write("Interest Rate: " +annualinterest+ "%<br>");
document.write("Loan Amount: $" +loanamount+ "<br>");
for (var count=2;count<=6;count+=1)
{
document.write(+calculate()+"<br />");
}
</script>
</body>
</html>
最佳答案
好的，您必须自己增加nummonths。像这样...
for (var count=2;count<=6;count+=1)
{
document.write(+calculate()+"<br />");
nummonths += 12;
}
此外，您还可以使用 http://josscrowcroft.github.io/accounting.js/进行货币格式设置。
关于JavaScript 循环程序，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17582842/