javascript - JS中大数算术运算如何得到精确的整数结果？

Question

JS中大数的乘除运算如何得到精确的整数结果？

假设我们有:

var a = 75643564363473453456342378564387956906736546456235342;
var b = 34986098309687982743378379458582778387652482;

将这些数字相乘得到一个采用科学“e”表示法的数字。如何显示整个精确整数结果数？

我尝试过使用这个库 https://github.com/peterolson/BigInteger.js

自述文件说:

Note that Javascript numbers larger than 9007199254740992 and smaller than -9007199254740992 are not precisely represented numbers and will not produce exact results. If you are dealing with numbers outside that range, it is better to pass in strings.

但是如何用字符串进行数学运算呢？

Answer 1

使用bigInt，正如您所暗示的，您需要使用字符串而不是数字来正确表示它们。

bigInt("75643564363473453456342378564387956906736546456235342").multiply("34986098309687982743378379458582778387652482");