javascript create array of numbers code example

Example 1: 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 2: how to fill array with consecutive numbers javascript

Array.from({length: n}, (_, i) => i + 1)
//=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

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]