如何在 Javascript 中存储大于 2147483647 的整数？

Question

From what I understand integers range from

 -2147483648 through 2147483647

I am confused because I noticed some references to big int in javascript. Can someone explain how I can store an integer number larger than 2147483647?

Answer 1

为了超越 JavaScript 的内部数字限制，请使用类似bignum 库的东西（我发现的只是一个随机库，研究一个好的库作为练习留给 OP）。

Answer 2

BigInteger.js是一个用于 Javascript 的任意长度整数库，允许对无限大小的整数进行算术运算，尽管有内存和时间限制。

Answer 3

Depending on what you are doing the number, you can handle integers up to +/- (2^53)-1 or 9007199254740991 .

While not all browsers support Number.MAX_SAFE_INTEGER yet, you can calculate it with:

Math.pow(2, 53) - 1 

Note: This works when in pure math functions, but many bitwise operations are limited to 16 bit integers, as well as the index in arrays.

More details can be found here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER

Answer 4

two ways we can store big int

const bigIntVal=123243435454656565657575n;

or

const bigIntVal=BigInt("123243435454656565657575");