Change the decimal places of an existing number in bignumber.js?

Asked Oct 27 '17 at 05:13

Active Dec 27 '21 at 15:06

Viewed 2,396 times

If I've got a BigNumber (http://mikemcl.github.io/bignumber.js/) with a particular DECIMAL_PLACES:

let BN = BigNumber.another({ DECIMAL_PLACES: 0 })
a = new BN(10)

How can I change the number of decimal places used for a particular operation?

For example:

> a.div(3)
3
> a.setDecimalPlaces(1).div(3)
3.3

I know I can create a new BigNum(…):

> (new BigNumber(a)).div(3)
3.333…

But that seems less than ideal.

edited Dec 27 '21 at 15:06

Bergi

asked Oct 27 '17 at 05:13

David Wolever

`BN.set({ DECIMAL_PLACES: 5 });` and you may work with higher precision by default, then use the `.round(0)` to return particular results – Jonas Wilms Oct 27 '17 at 05:28
Ah, so it needs to be done at the class level and not the instance level? – David Wolever Oct 28 '17 at 18:30

0 Answers0