Question

[Solved] Does parseDouble exist in JavaScript?

In JavaScript, I have a number which is 21 digits, and I want to parse it.

Does a parseDouble method exist in JavaScript?

Solution #1:

It’s not possible to natively deal with a 21-digit precision number in JavaScript.

JavaScript only has one kind of number: “number”, which is a IEEE-754 Double Precision (“double”) value. As such, parseFloat in JavaScript is the equivalent of a “parse double” in other languages.

However, a number/”double” only provides 16 significant digits (decimal) of precision and so reading in a number with 21-digits will lose the 5 least significant digits1.

For more precision (or accuracy) a “big number” library must be used;

1 Information can be lost when encoding as an IEEE “double”, which cannot encode all decimal values exactly, but that’s another question..

Respondent: user2864740

The answers/resolutions are collected from stackoverflow, are licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 .

Most Popular

To Top
India and Pakistan’s steroid-soaked rhetoric over Kashmir will come back to haunt them both clenbuterol australia bossier man pleads guilty for leadership role in anabolic steriod distribution conspiracy