how to split a large integer in javascript

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All:

How can I correctly turn a VERY VERY LARGE number(at least 32 digits) into a character array?

For example:

var n = 111111122222233333334444444445555555555666666677777777788888888888

Thanks,

If you're dealing with very large numbers in javascript (anything greater than Number.MAX_SAFE_INTEGER) you'll have to handle the number differently than you would a normal integer.

Several libraries exist to help aid in this, all of which basically treat the number as a different type - such as a string - and provide custom methods for doing various operations and calculations.

For example, if you only need integers you can use BigInteger.js. Here's an implementation below:

const bigInt = require("big-integer")

const largeNumber = bigInt(
  "111111122222233333334444444445555555555666666677777777788888888888",
)
const largeNumberArray = largeNumber.toString().split('')

Also check out some other stackoverflow questions and resources regarding handling big numbers in Javascript:

npm's big-number-> https://www.npmjs.com/package/big-number

What is the standard solution in JavaScript for handling big numbers (BigNum)?

Extremely large numbers in javascript

What is the standard solution in JavaScript for handling big numbers (BigNum)?

http://jsfromhell.com/classes/bignumber

http://www-cs-students.stanford.edu/~tjw/jsbn/

How To Split Number To Individual Digits Using JavaScript, This blog post explains how to work with large integers, by encoding them in strings. All numbers in JavaScript are floating point which means that integers are always represented as The following steps divide 290 by 15. The split () method is used to split a string into an array of substrings, and returns the new array. Tip: If an empty string ("") is used as the separator, the string is split between each character. Note: The split () method does not change the original string. Browser Support. string .split ( separator, limit) Parameter Values.

If you aren't breaking the maximum integer value for JavaScript, then you can use:

var n = 123456789;
var l = n.toString().split('');

That will get you an array where the first value is the 1 character, the second is the 2, etc.

How do I separate an integer into separate digits in an array in , BigInt can be used for arbitrarily large integers. Description. A BigInt is created by appending n to the end of an integer literal — 10n — or  Basically, every method will use the slice method in order to split the array, in this case what makes this method different is the for loop. In case that the array is not uniform, the remaining items will be in an array too, however the size will be less for obvious reasons. /** * Returns an array with arrays of the given size.

You can get the string representation of a number by calling toString and then convert it to a character array using Array.from.

var number = 123456789;

console.log(Array.from(number.toString()));

var bigNumber = "34534645674563454324897234987289342";

console.log(Array.from(bigNumber));

What are integers in JavaScript?, There is no integer type. In more recent implementations, JavaScript also supports arbitrarily large integers using the BigInt type. It determines on what basis the string will be split. The separator character can be any regular character. The limit character tells the program how many elements to create when the string is split. Portions of the string that remain after the split will not be included in the resulting array. The Separator criterion and the limit criterion

One way is to use an algorithm that takes one digit at a time by successively dividing by ten. This is a process intensive approach, though. The alternative is to​  The JavaScript Split function is a String function, which is used to split the original string into an array of substring based on the separator we specified and returns them in an array. JavaScript Split string function accepts two arguments. The first argument is the separator you want to use, and the second integer value is used to restrict

Converting Variables to Numbers. There are 3 JavaScript methods that can be used to convert variables to numbers: The Number() method; The parseInt()  Here is how I would approach the problem. The trick I used was to split on the empty string to convert the string to an array and then use reduce on the array.. function digitSum(n) { // changes the number to a string and splits it into an array return n.toString().split('').reduce(function(result, b){ return result + parseInt(b); }, 0); }

How large a number's magnitude can become is determined by its internal Because JavaScript's numbers keep magnitude and sign separate, each  The parseInt () function parses a string and returns an integer. The radix parameter is used to specify which numeral system to be used, for example, a radix of 16 (hexadecimal) indicates that the number in the string should be parsed from a hexadecimal number to a decimal number. Note: Only the first number in the string is returned!

Comments
  • you can't - because your example is larger than Number.MAX_SAFE_INTEGER - note: in Chrome and Node you can var n = 111111122222233333334444444445555555555666666677777777788888888888n; n.toString().split('') - not the n at the end of the number
  • Where is the number coming from? Easiest solution would be to make it a string from the start if you can.