javascript create an array of numbers code example

Example 1: javascript fill array with range

function range(start, end) {
  return Array(end - start + 1).fill().map((_, idx) => start + idx)
}
var result = range(9, 18); // [9, 10, 11, 12, 13, 14, 15, 16, 17, 18]
console.log(result);

Example 2: create array with number js

var foo = new Array(45); // create an empty array with length 45

Example 3: building an array of a numbers javascript

const arr = [...Array(2)] // output [undefined, undefined]