A JavaScript Array is an object that helps programmers store data in a list. It appears as an ordered sequence of values, including strings, numbers, or objects. These values are accessed using indices or keys.
A JavaScript Array has the following properties: the length of the Array; the number of dimensions; whether it is empty; its size; and whether it contains any null or undefined values.
Arrays can be either dense (items are stored sequentially) or sparse (items are stored randomly). An array’s length should always be finite, that is, it should not contain any null or undefined values.
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