Javascript循环程序

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一行上输入不同的数字。假设显示24个月，36个月，48个月和60个月开始支付的金额。我正在使用函数来进行计算，但我总是得到24个月的结果。我知道你必须将nummonths改为36,48和60，但我不知道这样做。我认为循环会在每次循环时增加12个月。另外你会如何将数字格式化为货币？最后我得到一个非常长的数字。我试着在calculate（）上做parseFloat，但是我得到一个错误。这里是我的代码：Javascript循环程序

<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>

来源

2013-07-10 jaramore

好吧，你必须自行递增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/做货币格式。

来源

2013-07-10 23:53:42 mohkhan

谢谢！你如何将结果格式化为货币？ – jaramore

我无法使accounting.js正常工作。你怎么做呢？ – jaramore

看看这里格式化http://stackoverflow.com/questions/149055/how-can-i-format-numbers-as-money-in-javascript – Stuart

既然你不使用count什么，你也可以遍历nummonths代替：

for (nummonths = 24; nummonths <= 60; nummonths += 12) { 
    document.write(calculate() + "<br />"); 
}

来源

2013-07-11 00:00:26 Stuart

Javascript循环程序

回答

相关问题