create array of numbers js code example

Example 1: es6 create array with increasing number

Array.from(Array(10).keys())
//=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Example 2: generate array range

for (i of range(1, 5)) {
    console.log(i);
}
/* Output
 * 1 2 3 4 5 */

[...range(1, 5)] // [1, 2, 3, 4, 5]

Example 3: create array with number js

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

Example 4: building an array of a numbers javascript

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