How to remove zero after decimal point on a float using javascript

Question

Possible Duplicate:
jQuery: rounding numbers to 2 digits after comma

While printing out a number in JavaScript, I only want keep only three digits after the decimal point. The code I am using shows more than 8 digits after the decimal point. Could anyone guide me on how to remove the remaining digits using JavaScript.

This is my JavaScript code:

function  doMath() { 

   var nvalue; var amount;
   var price= 0.27;
   nvalue = document.getElementById("message").value;

   amount=(nvalue*price);

   document.getElementById("total").value=amount ;

}

Output:

4.050000000000001

I want:

4.050

Any help would be appreciated, thank you.

Perhaps this question answers your question http://stackoverflow.com/questions/4098685/jquery-rounding-numbers-to-2-digits-after-comma — CaptainCarl, Nov 01 '12 at 09:31

score 1 · Answer 1 · answered Nov 01 '12 at 09:35

1

use toFixed() method of javascript

toFixed() method converts a number into a string, keeping a specified number of decimals.

var amount= amount.toFixed(3);  //3 digits after decimal

answered Nov 01 '12 at 09:35

bipen

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score 1 · Answer 2 · answered Nov 01 '12 at 09:38

I would not recommend using .toFixed() for rounding numbers, since it returns a string. In your case, this is probably quite ok, since it looks like it's for display, but in general, do some maths:

function betterToFixed(num, decPlaces) {
  var factor = Math.pow(10, decPlaces);
  return Math.round(num * factor) / factor;
}

Johannes Mittendorfer · Answer 3 · 2012-11-01T09:40:02.717

0

Use toFixed():

amount = amount.toFixed(3);

edited Nov 01 '12 at 09:40

answered Nov 01 '12 at 09:34

Johannes Mittendorfer

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score 0 · Accepted Answer · answered Nov 01 '12 at 09:35

0

Please try this
amount=amount.toFixed(3);

answered Nov 01 '12 at 09:35

Elby

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score 0 · Answer 5 · answered Nov 01 '12 at 09:40

0

amount= amount.toFixed(3);

this will give you the solution you want

answered Nov 01 '12 at 09:40

PRATIK

27
3

How to remove zero after decimal point on a float using javascript

5 Answers5