How to do 64bit Integer arithmetic in Node.js?

Question

Anyone have any suggestions on how to perform arithmetic on 64bit integers in Node.js? The node-int64 package doesn't seem to support that.

I think you'll find this useful: stackoverflow.com/questions/9643626/… — Gabi Purcaru
– Gabi Purcaru, Commented Jun 4, 2014 at 12:46

Andy · Accepted Answer · 2017-04-04 21:56:38Z

28

Javascript does not support 64 bit integers, because the native number type is a 64-bit double, giving only 53 bits of integer range.

You can create arrays of 32-bit numbers (i.e. Uint32Array) but if there were a 64-bit version of those there'd be no way to copy values from it into standalone variables.

There are some modules around to provide 64bit integer support:

Maybe your problem can be solved using one of those libraries.

edited Apr 4, 2017 at 21:56

Andy

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answered Jun 4, 2014 at 12:48

Sarath

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user1502301 Over a year ago

Thanks! For some reason, that one didn't come up in my googling.

Alex Tullenhoff · Accepted Answer · 2019-12-27 01:45:45Z

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As of v10.4.0 NodeJS supports the BigInt type natively (see MDN BigInt docs). These support arithmetic operations too.

answered Dec 27, 2019 at 1:45

Alex Tullenhoff

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