From BigInt to binary in JS

Question

I'm calling an external function that returns a very large int as an interpretation of a binary number. A real example would be this:

output = 56904843415172010980318367264425014256050490817210830044164893489159338592392

I'm trying to convert this number into binary using JavaScript with a function I found around, but since JavaScript only supports 64-bit numbers is not working. Is there any workaround or libraries to this?

The decimal-to-binary function I'm using:

function dec2bin(dec) {
    return (dec >>> 0).toString(2);
}

Does this help you? Ref_one

Dhana D.
– Dhana D.

2021-08-17 12:14:14 +00:00
Commented Aug 17, 2021 at 12:14 — Dhana D.
– Dhana D., Commented Aug 17, 2021 at 12:14

Reda Benchraa · Accepted Answer · 2021-08-17 21:17:47Z

6

const input = '56904843415172010980318367264425014256050490817210830044164893489159338592392';
const binaryRepresentation = BigInt(input).toString(2);
console.log(binaryRepresentation);

edited Aug 17, 2021 at 21:17

answered Aug 17, 2021 at 12:15

Reda Benchraa

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2 Comments

jmrk Over a year ago

Why so complicated? BigInt(input).toString(2) is all you need! (Assuming input is a string, as this answer also assumes.)

Reda Benchraa Over a year ago

You are absolutely right (the answer was updated)

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