Declaring, creating, and initializing an array in JavaScript is as simple, as shown by the following:

var daysOfWeek = new Array(); //{1} 
var daysOfWeek = new Array(7); //{2} 
var daysOfWeek = new Array('Sunday', 'Monday', 'Tuesday', 'Wednes day', 'Thursday', 'Friday', 'Saturday'); //{3}

We can simply declare and instantiate a new array using the keyword new (line {1}). Also, using the keyword new, we can create a new array specifying the length of the array (line {2}). A third option would be passing the array elements directly to its constructor (line {3}).

However, using the new keyword is not best practice. If you want to create an array in JavaScript, we can assign empty brackets ([]), as in the following example:

var daysOfWeek = []; 

We can also initialize the array with some elements, as follows:

var daysOfWeek = ['Sunday', 'Monday', 'Tuesday', 'Wednesday',  'Thursday', 'Friday', 'Saturday'];

If we want to know how many elements are in the...