How to avoid decimal rounding in javascript or jquery

Question

how I should avoid decimal rounding in javascript suppose I have input like

input : 99999999999.999999 
Expected output : 99999999999.999999 

but i am getting output like

 100000000000

here, internally javascript rounding the decimal place. please let me know how should I avoid this javascript rounding???.

For example:

var test = 99999999999.999999;
console.log(test); //This will print 100000000000 instead

Answer 1

As @Aliendroid suggested, you can use the BigDecimal.js library. In my perspective, this is the best way to handle double and floats in JavaScript

To answer to your question more specifically, you can actually do this:

var test_number = new BigDecimal('99999999999.999999'); 
console.log(test_number.setScale(6).toString());

and to your original question:

please let me know how should I avoid this javascript rounding???

Well you can't as there is not double number in JavaScript, only float. So for example if you do something like this:

console.log(99999999999.99); //This is a float number

This will actually output: 99999999999.99

Answer 2

It is NOT Rounding

It is floating point error

learn floating point number in programming !

use string if needed and some Big number library

Ref:

http://floating-point-gui.de/

https://github.com/dtrebbien/BigDecimal.js