convert array into number javascript code example

Example 1: turn number into array javascript

const myNumber = 1245;
function numberToArray(number) {
  	let array = number.toString().split("");//stringify the number, then make each digit an item in an array
  	return array.map(x => parseInt(x));//convert all the items back into numbers
}
//use the function
var myArray = numberToArray(myNumber);

Example 2: convert array to number

let x = [1,2,3,4,5]
let num = +x.join("")