# Round Number (Value) To 2 Decimal Points

Dec 6, 2010
I have this js function:

<script type="text/javascript">

function updatesum() {

document.PaymentForm.newbalance.value = (document.PaymentForm.balance.value -0) - (document.PaymentForm.paymentamount.value -0);

}

</script>

I want to round the value of document.PaymentForm.newbalance.value to two decimal points.

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Sep 9, 2010

Tell me how to make decimal points an exception to the non-number pattern?code...

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Oct 14, 2010

I have an input in the form, where i have to do the following validations.

1) see if it is a number

2) allow digit grouping wither like 00,00,000(Asia format) or 000,000,000 (us format)

3) allow 2 decimal points 000,000.00

4) if the money does not conform to this format return false

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Nov 17, 2011

I am trying to use the following javascript [URL] to create something similar to the example on [URL] for a school project but I wondered if someone could advise me how I can round numbers to 2 decimal places in the field box as I have to convert the calculated value by an exchange rate, e.g.:

where x=100 and y=50

calculate="(x+y)/1.55"

returns a value of 96.77419355. I would like to round this figure up to 2 decimal places so it would read 96.77 but I cannot figure out how to do this.

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Nov 8, 2009

Suppose I do (5 * 0.039) + 0.59, then the result is 0.7849999999999999 - but I want to round it upwards and should have only 3 digits after decimal point. I found out that using toFixed(3) will get it to be 0.785, but the problem is that it add x.x00 for some numbers where there aren't much decimal numbers. Is there a way I can remove the 0's?

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Nov 18, 2009

I use the following to round off to two decimal point.It works fine

function roundNumber(rnum, rlength) {

var newnumber = Math.round(rnum*Math.pow(10,rlength))/Math.pow(10,rlength);

return newnumber;

}

[Code]....

how to get two decimal place instead of 1?

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Jan 11, 2010

My javascripting is getting there, I have been learning for the last week and I have produced a working script however im getting stuck with how you round a variable (stored user input) up to the nearest whole number to 2 decimals I have looked at many tutorials and I think that the math.round has to be used somewhere but I cannot work out the syntax to integrate it into my code because everywhere I have looked seems to be using document.write syntax:

[Code]....

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Jan 22, 2010

I am trying to develop a form that can give an estimate to viewers based on their input and I'm having a problem with decimal points. I couldn't find a very good free script online so I've done some work with this one [URL] When you enter 10 in the input box, it calculate 10*19.99, giving 199.9, but I want it to show 199.90. I've tried adding toFixed(2) in there, but I'm not able to get that to work.

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May 10, 2010

I am in the process of using the split function for splitting strings into an array. The problem I am dealing with is how to do this with local language. Not all languages us the space " " delimiter between words to write a phrase or sentence.

I have a list of all of delimiters for english, japanese, chinese, korean in Decimal Code Point format. For example, the decimal code point equivalent for " " is 32. Is it possible to use the javascript split function with decimal code points? If not, how can I reformat them into a format that js would understand?

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May 9, 2010

This sci calculator listed in [URL] has Round function which rounds the result to a nearest integer. I wonder if it possible to easy modify it so that it would leave two numbers after decimal point when it perform rounding? The calculator's script has these codes related to Round:

<INPUT style="WIDTH: 74px; HEIGHT: 31px" onclick="Round()" type=button size=24 value=Round>

And

function Round()

{form1.display.value=Math.round(form1.display.value);}

I tried {form1.display.value=Math.round(form1.display.value,2);}, but it did no do it.

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Jul 22, 2002

To round off a value to a specified number of digits:

function RoundIt(Value,Digits) {

var P=Math.pow(10,Digits);

var R=Math.round(Value*P)/P;

var G=true;

while(G) {

R=String(R);

var L=R.length;

var I=R.indexOf('.');

if (I == -1) {

R=R+'.'

} else {

var D=L-I-1;

if (D < Digits) {

R=R+Ɔ'

} else {

G=false;

}

}

}

return R;

}

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May 2, 2009

Is there a JavaScript method to convert a "plain" number into a decimal one?

Say: 12345678 is converted to 12.345.678

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Aug 3, 2010

How I can declare 3 decimal number and 2 decimal number in javascript?

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Oct 1, 2009

Is there a formatting or rounding technique to specify the number of digits to display after the decimal?

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Oct 29, 2010

I want to use a result for furtherer calculations but only want the whole number and not the decimal portion. In Excel there is a function "=INT(A1)" this ignores the decimal values in cell "A1",

e.g. if cell "A1=5.345"

and I use the following function in cell "A2" "=INT(A1)*3" I get the result "15"

How do I do this in JavaScript ?

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Jul 20, 2005

How do I separate the integer and decimal part of a number, ie. If I had

123456, and divided it by 1000 = 123.456,

how do I obtain 123 and 456 as seperate variables?

This is the sort of thing that is done using the "int" and "mod" function

in Excel...

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May 5, 2010

Is there a built in function to format a number to 2 decimal places and to add commas like below.

2,222.33

30,033.98

1,222,345,99

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Dec 3, 2011

I'd like the posted result to be a number with two decimals. I know how to make this normally but not with this kind of script.

<html>

<head>

<script type="text/javascript">

function calcResult(){

document.getElementById('result').innerHTML = '';

[Code]....

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Aug 16, 2009

Is it possible to have an input that points to some other function?

For example:

function someFunction() {

alert('It worked.');

}function doAnotherFunction(doIt, otherFunction) {

if (doIt == true) {

otherFunction();

}}

<input type="button" value="test" onClick="doAnotherFunction(true, someFunction());">

Or would I need a switch statement and have all the various functions hardcoded?

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Oct 18, 2011

I am not a developer so not so familiar with javascript. Suppose I have a map with ten junctions and based on that map. I need to calculate all the possible routes between one junction to another. How do I represent the map in javascript and how do I code the function to calculate all the possible routes?

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Oct 18, 2011

Suppose I have a map with ten junctions and based on that map, I need to calculate all the possible routes between one junction to another. How do I represent the map in javascript and how do I code the function to calculate all the possible routes?

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Dec 22, 2009

I have a boss who wants to show 5000 points on a Google map. So far, only a fraction of this being displayed freezes the browser. I've been challenged to make this possible while still in the realm of the browser. Would the flash version of Google maps api be a better bet? Does flash provide a better framework for this kind of heavy usage?

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Jul 1, 2011

I am trying to wrap a text selection with BBCode. I have it working, but there is one final part I need help with.[code]...

So, the last thing I need to do (the whole point of this post)... how do I MOVE the range start and end points so that only the selection is selected and NOT the whole thing?

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Nov 13, 2010

I need to know how to get the actual screen size in points or cms, not in pixels. The javascript functions give me the pixels, but I need to know how many points or centimeters that is regardless if it comes from a browser or a device like an ipad or iphone. Does anyone know the code to calculate this?

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Aug 13, 2010

I need to round down to the nearest quarter hour (or .25 in decimal) via Javascript and have not come across any appropriate code yet.

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Nov 22, 2011

I can't figure out this math problem. I have two points p1(30, 20) and p2(30, 221) and the parametric equation of the vector is (x-30)/(30-30)=(y-20)/(20-221)=t x=30, y=20-201*t

I'm thinking t is the magnitude or the distance. For a point P which is 10 pixels away from p1 on the vector, x=30, y=20-201*-10 (should be around -0.85) which is not the right P i'm looking for. Where am i doing wrong?

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