How to stop Javascript from rounding numbers after 16 decimal places?

Question

Let's say I have the following code:

console.log(1 / 3);

It prints "0.3333333333333333".

Is there a way to not have it stop?

(For any curious souls: it's for calcuating Pi)

No, you'll need to implement the calculation with the desired precision yourself, perhaps https://stackoverflow.com/q/16742578 — CertainPerformance, Apr 18 '22 at 06:11
Do you want to print 16 decimenls after 0? Or do you want to get something like 0.3 ? — debugger, Apr 18 '22 at 06:13
`calculating Pi` - you do know that the digits of Pi is infinite right? It's also infinitely non-repeating (unilke 0.33333... which repeats after 1 digit) — slebetman, Apr 18 '22 at 06:14
@slebetman Yes I understand that. Don't question it, and just let me know if there is a way. — The Code Challenger, Apr 18 '22 at 06:15
Would something that simply did `process.stdout.write('3')` in a loop meet your needs? If not, why not? Meta: the question seems ill-posed - there are probably thousands of ways to alter what you're doing to "not have it stop", but I suspect that there are additional constraints that you're not telling us about. — Mark Dickinson, Apr 18 '22 at 09:29

score 1 · Accepted Answer · answered Apr 18 '22 at 09:36

1

Write a function whrere the numbers are multiplied with precision before they divided:

function div(num1, num2, prec=100) {
  return (num1*prec)/(num2*prec).toFixed(prec)
}

console.log(div(1,3,100));
console.log(div(11,13,100));

answered Apr 18 '22 at 09:36

exphoenee

score 0 · Answer 2 · answered Apr 18 '22 at 06:22

0

Use the .toFixed method:

console.log((1/3).toFixed(2))

answered Apr 18 '22 at 06:22

exphoenee

This has some unintended side-effects. If you do: `console.log((1 / 3).toFixed(100));` it returns 0.3333333333333333148296162562473909929394721984863281250000000000000000000000000000000000000000000000 Plus it only goes up to 100. – The Code Challenger Apr 18 '22 at 06:26

2 Answers2