javascript - More accurate value of Pi? [duplicate]

Question

This question already has answers here:

Javascript: PI (π) Calculator (5 answers)

Closed last year.

I type Math.PI; in Chrome Console and this is returned:

3.141592653589793

Then I type Math.PI - 3.141592653589793; and 0 was returned.

Is there a way to get a more accurate value (such as 3.1415926535897932384) of Math.PI in Javascript?

Answer 1

The maximum decimal places in javascript is limited to 15.

So you cannot get more than 15 decimal places.

But you can get up to 20 decimal places by doing but its not accurate

Math.PI.toFixed(20); //3.14159265358979311600

That will give you a PI value with 20 decimal places.

Note: 20 is the maximum and 0 is the minimum for toFixed().

So trying Math.PI.toFixed(100) will throw an error.

Answer 2

I don't see why you would need PI to such accuracy but you can either :

a) Calculate PI yourself using Leibniz formula

b) Define PI yourself (using this library)

var PI = new bigdecimal.BigDecimal("3.141592653589793238462643383279");

You can find first 100,000 digits of PI here if you really need it.