I have this code below:

let n = 100n;
let x = 0.1;

console.log(n/x); // Throws error

Error:

TypeError: Cannot mix BigInt and other types, use explicit conversions

How do I divide a BigInt by a decimal value in JavaScipt?

CodePudding user response：

In general...

...mixing number and BigInt is asking for trouble, which is why no math operators will let you do it and explicit conversion is required.

(Note: Decimal is on the horizon, which will apply here when it matures.)

If you want a number result...

...convert the BigInt to a number before doing the calculation; beware that the conversion may be lossy for very large numbers (this is the point of BigInt), specifically numbers above Number.MAX_SAFE_INTEGER or below Number.MIN_SAFE_INTEGER:

let n = 100n;
let x = 0.1;
let result = Number(n) / x;
console.log(result);

If you want a BigInt result...

...it's more complicated, because you have to decide what to do with a fractional result. (Your example won't have a fractional result, but the general case will.) You could go through number, but again that's a potentially lossy operation:

let n = 100n;
let x = 0.1;
let result = BigInt(Number(n) / x); // Throws if the result is fractional
// let result = BigInt(Math.round(Number(n) / x)); // Rounds instead of throwing
console.log(result.toString());

If you can refactor the operation so you can express it in whole numbers, that makes it a lot easier, because then you can make x a BigInt. For instance, in your specific case, / 0.1 is the same as * (1 / 0.1) which is * 10:

let n = 100n;
let x = 10n;
let result = n * x;
console.log(result.toString());

...but that's just that specific case.

You'll probably find you need to handle it on a case-by-case basis, trying to avoid doing the operation. When you can't, and the divisor is fractional, a round-trip through number may be unavoidable.

CodePudding user response：

Just Convert the bigint to number. It will Work.

let n = 100n;
let x = 0.1;
console.log(Number(n)/x); 

It will Return Result 1000