# Specify The Number Of Digits To Display After The Decimal?

Oct 1, 2009

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

## Regular Expression :: Allow 1,2 Or 3 Digits Before Decimal Point

Jun 8, 2006

I wrote a regex to edit a decimal number. you're allowed 1,2, or 3
digits before the decimal point, and 0,1,2,or 3digits after the decimal
point. Of course, you can't enter a decimal point without at least a
digit after ("5." is invalid). So here is my regex

pattern=/^d{1,3}(.(?=d))d{0,3}\$/

This works fine for every case except an integer. In other words, it
tests false for entering 5, or 567.

I don't see why it tests false for integers. I'm allowing 1-3 digits
before the decimal point, then a decimal point only if the next
character is a digit (the lookahead clause), and then 0-3 digits after
the decimal point.

I've gotten around this problem with other javascript code around
the regex, but I'd just like to know why this "clean" solution doesn't
work.

## Rounding Figure And Have Only 3 Digits After Decimal Points

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?

## Money Validation For A Field - Accept 2 Digits Decimal 000,000.00

Oct 15, 2010

I need to do javascript money validation for a field. the condtions are

1) depending on the Locale (not sure if this can be done in JS like US,Germany..)

2) verify if it has \$,pound symbol, yen symbol..

3) group the digits either like 00,00,000 or 000,000,000

4) accept 2 digits decimal 000,000.00

## Get First Digits In A Number?

Jul 19, 2010

This is probably the stupidest question ever. I know in java you can take advantage of a number being an int (not double) and divide by something without getting a remainder. But in javascript you dont declare what kind of variable something is.

So my problem is: Given any double or triple digit number, how do i get all but the last digit. Like if i have 13, I need to make an int with 1. If it's 103 i need one with 10.

## Regex, Remove Non Digits From A Number

Jul 20, 2005

I need to remove non digits from a number.

I thought I could do this:

var phone=&#3922;-p67s82'
var re=/D/g;
phone=phone.replace(re,'');

What dumb thing am I missing. That regex removes nothing.

Feb 15, 2012

I need Javascript validations of :

2. Valid E Mail Address and

3. 6 Digits Pincode

## Phone Number Validation \ Check Whether It Exactly Contains ONLY 10 Digits?

Aug 18, 2011

I want to validate phone number in my project. I include some validations. Furthermore i want to check whether it exactly contains ONLY 10 digits.nothing more and nothing less.How should i include that?

if (document.form1.phone_number.value == '')
{

[code].....

## Convert Number To Decimal?

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

## How To Declare 3 Decimal Number

Aug 3, 2010

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

## Modulus Operator Is Not Working If Give Number More Than 24 Digits

Dec 7, 2009

If number is more than 24 digits, modulus operator is not giving correct output [code]...

## Round Number (Value) To 2 Decimal Points

Dec 6, 2010

I have this js function:
<script type="text/javascript">
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.

## Format A Decimal Number To An Integer?

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 ?

## How Do I Separate The Integer And Decimal Part Of A Number

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...

## Function To Format A Number To 2 Decimal Places?

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

## Making The Result Of A Multiplication A Two Decimal Number?

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>
<script type="text/javascript">
function calcResult(){
document.getElementById('result').innerHTML = '';

[Code]....

## Make Decimal Points An Exception To Non-number Pattern?

Sep 9, 2010

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

## Getting Double Digits To Display On Calendar - 01 Not 1

Feb 17, 2009

I have a calendar that I have got working, however I want the calender to have double digits at all times, 01, 02 etc not 1,2 as it is at the moment, i have been playing around with the code but can't figure out which bit effects it.

Code JavaScript:
function buildCal(m, y, cM, cH, cDW, cD, brdr){
var mn=['January','February','March','April','May','June','July','August','September','October','November','December'];

[Code].....

## Display Number Of Characters In Textarea Box

Sep 11, 2005

i wish to count number of characters in textarea box during typing in and display it somewhere in html page. so the number will increase during writing. is it possible to do it by javascript?

## Display Negative Number As A Positive?

Dec 20, 2005

I have a calculated value that is negative, which I need to display in a javacript prompt as positive. In ColdFusion, there is a function called ABS(), which gives you the absolute value of the number in question, so ABS(-5) = 5. Is there something similar in javascript? If no, how would I display a negative number without it's negative sign? Again, this is only for display purposes withing an alert.

## Display The Result Of The Factorial Number?

Sep 2, 2010

I'm just want to display the result of the factorial number, but i keep trying and nothing happend i think it has something to do with my function.

<html>
<style>
input {width:30px}

[Code].....

## Display A Random Number Using InnerHTML?

Oct 15, 2011

I trying to display a random number using innerHTML

Here's my code:

HTML Code:
<html>
<script language="JavaScript">

[Code].....

## Count The Number Of Elements Who Display Block?

Sep 26, 2009

So never done this one before so I am having a bit of a time trying to figure this one out.

Say I have a list of LI element and only a few of them have a inline style of display block, the rest have a display of none.

How would I go about looping through and dertmining the number of elements that have a display of block?

for(var m = 0; m < li.style.display.length; i++)
{
};

The above is just crazy but where my mind melts..

## Greasemonkey - Display Number Of Clicks Since Last Refresh?

Jan 14, 2010

I've just started some JavaScript development, but have run into a bit of a problem with a Greasemonkey script I'm working on. This script is for personal use. I'm doing a variety of things on a page, including auto-refreshing it. I want to display the number of clicks (preferably just on links) since the last refresh.

## Try-catch Error Handling -- Display Line Number?

Jul 20, 2005

I need help finding where an error is occuring in my code. I use a
try-catch block like this in my global.asa:

} catch (e) {
Application('errormsg') = ("An exception occurred in the script. Error
name: " + e.name
+ ". Error description: " + e.description
+ ". Error number: " + e.number
+ ". Error message: " + e.message); }

And this is what is SOMETIMES returned when I display
Application('errormsg'), the rest of the time, it works:

An exception occurred in the script. Error name: Error. Error description:

But I don't know which path is not found! (I'm using the filesystem object
and importing data from a file into SQL.) Is there a way to display the
line number of the error or more details? Or do I just have to try to catch
the error by going through each bit of code?

## Variables Scope In Dynamic Functions - Display The Number 1 At First And Then 2

Mar 19, 2011

I have got this piece of code:

Code:

I would like to display the number 1 at first and then 2. but this code produces number 2 for both alerts. I was able to achieve what i wanted with "new" constructor when creating functions but this is not a good practice and after all i am passing these functions as an event handlers and it can't be done with "new" keyword because it is throwing error. I think there are some solutions with arrays e.g the x would be an array of numbers, but i don't like it. Am i missing something important?