Create a new array in javascript

There are several ways to create a new array in JavaScript:

Using the [] syntax:
```
let myArray = [];
```
This creates an empty array.
Using the Array() constructor:
```
let myArray = new Array();
```
This also creates an empty array.

Using the Array() constructor with arguments:

let myArray = new Array(5); // creates an array with 5 elements, all set to undefined

Using the Array() constructor with arguments and initial values:

let myArray = new Array(5, 10, 15); // creates an array with 3 elements: 5, 10, and 15

Using the spread operator (...) with an existing array:

let myArray = [...existingArray]; // creates a new array with the same elements as existingArray

Using the Array.from() method:

let myArray = Array.from({ length: 5 }, () => 0); // creates an array with 5 elements, all set to 0

Using the Array.prototype.fill() method:
```
let myArray = new Array(5).fill(0); // creates an array with 5 elements, all set to 0
```
Note that the [] syntax is the most common and concise way to create a new array in JavaScript.