# Thread: How to round figures to 2 decimal places

1. ## How to round figures to 2 decimal places

Hi All,

I have obtained a Javascript calculator from a website, but the total calculation field shows up like 15 decimal places. Can someone show me how to change itso it shows only 2 decimal places.

<script language="JavaScript">
<!--
function showpay() {
if ((document.calc.loan.value == null || document.calc.loan.value.length == 0) ||
(document.calc.months.value == null || document.calc.months.value.length == 0)
||
(document.calc.rate.value == null || document.calc.rate.value.length == 0))
{ document.calc.pay.value = "Incomplete data";
}
else
{
var princ = document.calc.loan.value;
var term = document.calc.months.value;
var intr = document.calc.rate.value / 1200;
document.calc.pay.value = princ * intr / (1 - (Math.pow(1/(1 + intr), term)));
}

// payment = principle * monthly interest/(1 - (1/(1+MonthlyInterest)*Months))

}

// -->
</script>

<span class="style13">The results of this loan payment calculator are for comparison purposes only.
They will be a close approximation of actual loan
repayments if available at the terms entered, from a financial institution. This
is being
provided for you to plan your next loan application. To use, enter values
for the
Loan Amount, Number of Months for Loan, and the Interest Rate (e.g.
7.25), and
click the Calculate button. Clicking the Reset button will clear entered
values.
</span>
<p>
<center>
<form name=calc method=POST>
<table width=60% border=0>
<tr><th bgcolor="#aaaaaa" width=50%><span class="style12">Description</span></th>
<th bgcolor="#aaaaaa" width=50%><span class="style12">Data Entry</span></th>
</tr>
<tr bgcolor="#CCCCCC"><td>Loan Amount</td>
<td align=right><input
type=text name=loan
size=10></td></tr>
<tr bgcolor="#CCCCCC"><td>Loan Length in Months</td>
<td
align=right><input type=text
name=months size=10></td></tr>
<tr bgcolor="#CCCCCC"><td>Interest Rate</td>
<td align=right><input
type=text name=rate
size=10></td></tr>
<tr><td bgcolor="#CCCCCC">Monthly Payment</td>
<td bgcolor="#FFFF00"
align=right><em>Calculated</em> <input
type=text name=pay size=10></td></tr>
<tr bgcolor="#FFFFFF"><td height="42"align=center><input type=button onClick='showpay()'
value=Calculate></td><td align=center><input type=reset
value=Reset></td></tr>
</table>
</form>
<font size=1>Enter only numeric values (no commas), using decimal points
where needed.<br>
Non-numeric values will cause errors.</font>
</center></td>

Thanks

2. Javascript has a toFixed () function in the Number class that'll do what you want.

3. Sorry, I'm very new to Javascript. Any chance you could show me how?

4. Code:
```  numToRound = 25.5555555
num = new Number (numToRound);
numRounded = num.toFixed (2);```

5. Cool, now where do I put it?

6. bump - just need to know where to put the code. please

7. pocketsize
not try to steal your thunder but Oracle seems ancious

PHP Code:
``` document.calc.pay.value = (princ * intr / (1 - (Math.pow(1/(1 + intr), term)))).toFixed(2);  ```

8. Many Thanks. I owe you, both!

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