Is there a way to convert a string larger than a length of 15 to a number, without rounding?

Question

When converting a large string to a number, I noticed there is round after the 15th digit. Is there a way to convert a string to a number to in JS without rounding, regardless of the length?

Number("9223372036854775807")
// returns  9223372036854776000

+"9223372036854775807"
// returns  9223372036854776000

"9223372036854775807"*1
// returns  9223372036854776000

https://stackoverflow.com/questions/5450012/how-to-convert-a-string-to-long-in-javascript — Tinu Jos K, Jan 28 '20 at 05:09
`BigInt` is its own type. Is there no way to solve this while keeping the type a `number`? Is this just a short coming of JS? — eagercoder, Jan 28 '20 at 05:21
@eagercoder I just found the bugnumber js library. Think it will serve your purpose - https://github.com/MikeMcl/bignumber.js/ — Vijay Joshi, Jan 28 '20 at 05:43

score 1 · Answer 1 · answered Jan 28 '20 at 05:10

1

You can use the BigInt object which can hold numbers upto 2^53 - 1.

let hugeString = BigInt("9223372036854775807")
console.log(hugeString);
// outputs: 9223372036854775807n

answered Jan 28 '20 at 05:10

Vijay Joshi

919
7
17

Is there a way to convert a string larger than a length of 15 to a number, without rounding?

1 Answers1