Javascript Formatting numbers with commas

I would have to check, but that would change it to a string, I think. But you could then change it back. I think there is a better way IF there is only one decimal point.

I agree this is the proper way in looking at it in more detail.

Thanks Richard.

It works, but it doesn't display the 4th decimal (the number was 12345.5432). I am currently working on a project for a financial services company, so I need a function to display all decimals, which is why i added such a complicated number as an example.

My apologies Carlo, i missed that bit.

in the documentation it says you can add various options including a max significant figures. So if you run the function like so

number.toLocaleString('en', {maximumSignificantDigits : 21})

You'll obviously see 21 significant digits which should hopefully be enough for you :)

full documentation below

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString

Richard, thanks for your help I appreciate it.. I was able to use the function successfully. The only issue is that is not supported by Safari and older browsers (IE 10 for example), and mobile.

If you want full support across all browsers, you might have to resort to changing the number to a string, splicing it, adding commas at every third position in the first part, and then displaying all three parts (the first part, the period, and then the trailing decimal places) to the screen that way.

I am trying to display a number such as 12345.5432. An array doesn't help.

sorry, maybe i misunderstood something. :) Why do you want to use a number with several decimal ponts?

You would like to change the decimal point to a comma?

If yes, you need to replace the decimal point to a comma, but in this case the result is a string not a number.

var number = 143.42673452345;
document.write(number.toString().replace(/[.]/, ","));

Sorry but when you write out an array to the screen, with document.write or with innerHTML you get the commas :)

Try it: http://codepen.io/anon/pen/GJZVPe

When you call the array without specifying which part of the array you want, you are, in essence, turning the array into a string variable. Change your code to numbers[0] and it returns 1 without the comma. 1 is the value in the 0 spot of the array.

As I understand the issue, you have a number with a value of 1000 or more. Carlo wants JS to automatically add a comma like this: 15,000. He does not want 15000. The issue I have is he also says that it has more than one decimal point. I believe if there is more than one decimal point it is a string, not a number.

Any type of manually inserting a comma defeats the purpose because it has to be manually formatted each time.

I may be misunderstanding the issue, though.

Thanks for the answers.

I am currently working on a project for a financial services company, so I need a function to display all decimals, which is why i added such a complicated number as an example (12345.5432). I have seen some very complicated functions online, but don't understand them at all, and could not make them work. If anyone can find one that works and explain to me how to apply it I would appreciate it. thanks.