help please

**vbean** · 03-25-2009, 11:08 PM

can someone pleeeease help me with this javascript
i have no idea what's wrong with it
but i can load it up so there must be something wrong with it...

<HTML>
</HEAD>
<TITLE> Last HOMEWORK </TITLE>
<SCRIPT type="text/javascript">

function monthlyRate (interest) {

var rate = interest / 100;
rate = rate + 1;
rate = ((1 + interest) ^(1/12)) minus 1);
return monthRate;
}

</SCRIPT>
</HEAD>
<BODY>
<SCRIPT type="text/javascript">

var price = parseFloat (prompt ( "What was the purchase price for the item you are interested in buying?"));
var interest = parseFloat ( prompt ( "What is the annual interest rate on your credit card?"));
var pay = parseFloat ( prompt ("How much do you plan to pay towards you credit card balance each month?"));

var monthly = monthlyRate (interest);

var bill = price;

var month = 0;

while (bill >= pay) {
bill = price - pay
bill = bill * (1 + monthRate)
price = bill
}
if ( bill < pay) {
var amount = pay * month + bill
alert ("You have actually spend "+ amount +" on this item")
}

</BODY>
</SCRIPT>
</HTML>

**Nile** · 03-25-2009, 11:09 PM

The operator '^' doesn't work in js.
Use Math.sqrt().

More info here.

**vbean** · 03-26-2009, 12:05 AM

still doesn't work

thanks though

**Nile** · 03-26-2009, 12:07 AM

Here:

Code:

return monthRate;

Shouldn't it be:

Code:

return rate;

Still using the Math.sqrt.

**vbean** · 03-26-2009, 12:32 AM

ok. did that as well and still nothing. i used firebug and it said :

missing ) in parenthetical
[Break on this error] rate = (((1 + interest) Math.sqrt(1/12)) minus 1));\n
javascri... 8.html (line 12)
syntax error
[Break on this error] </BODY>\n

i have no idea what this means.

**Nile** · 03-26-2009, 12:45 AM

I think it should be:

Code:

rate = (((1 + interest) Math.sqrt(1/12)) - 1);

But I made a mistake, use Math.pow(a,b). See more info on the page above.

**vbean** · 03-26-2009, 12:49 AM

oh yes! you have a good eye

but firebug still says the same thing...
thanks for helping me btw

**Nile** · 03-26-2009, 12:51 AM

Glad to help you so far, I hope you saw my edit about Math.pow.
Please gimme all your code with the updated stuff.

**vbean** · 03-26-2009, 12:54 AM

<HTML>
<HEAD>
<TITLE> Last HOMEWORK </TITLE>
<SCRIPT type="text/javascript">

function monthlyRate (interest) {

var rate = interest / 100;
rate = rate + 1;
rate = (((1 + interest) Math.pow(1,12)) - 1));
return Rate;
}

</SCRIPT>
</HEAD>
<BODY>
<SCRIPT type="text/javascript">

var price = parseFloat (prompt ( "What was the purchase price for the item you are interested in buying?"));
var interest = parseFloat ( prompt ( "What is the annual interest rate on your credit card?"));
var pay = parseFloat ( prompt ("How much do you plan to pay towards you credit card balance each month?"));

var monthly = monthlyRate (interest);

var bill = price;

var month = 0;

while (bill >= pay) {
bill = price - pay
bill = bill * (1 + monthRate)
price = bill
}
if ( bill < pay) {
var amount = pay * month + bill
alert ("You have actually spend "+ amount +" on this item")
}
</BODY>
</SCRIPT>
</HTML>

**Nile** · 03-26-2009, 01:02 AM

Well, I didn't spend time orgainizing it, but here:

Code:

<HTML>
<HEAD>
<TITLE> Last HOMEWORK </TITLE> 
<SCRIPT type="text/javascript">
  function monthlyRate(interest) {
    var rate = interest / 100;
    rate = rate + 1;
    rate = (((1 + interest) + Math.pow(1, 12)) - 1);
    return rate;
  }
</SCRIPT>
</HEAD>
<BODY>
<SCRIPT type="text/javascript">
  var price = parseFloat(prompt("What was the purchase price for the item you are interested in buying?"));
  var interest = parseFloat(prompt("What is the annual interest rate on your credit card?"));
  var pay = parseFloat(prompt("How much do you plan to pay towards you credit card balance each month?"));
  var monthly = monthlyRate(interest);
  var bill = price;
  var month = 0;
  while (bill >= pay) {
    bill = price - pay
    bill = bill * (1 + monthly)
    price = bill
  }
  if (bill < pay) {
    var amount = pay * month + bill
    alert("You have actually spend " + amount + " on this item")
  }
</SCRIPT>
</BODY>
</HTML>

Thread: help please

Thread Tools

Search Thread

help please

ok done

ok

here

Bookmarks

Bookmarks

Posting Permissions