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An array is an ordered collection of data (either primitive or object depending upon the language). Arrays are used to store multiple values under a single variable name. A regular variable, on the other hand, can store only one value.

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Array

Each item in an array has a number attached to it, called a numeric index, that allows you to access it. In JavaScript, arrays start at index zero and can be manipulated with various methods .

Arrays in JavaScript look like this:

js
                                    
                                        // Arrays in JavaScript can hold different types of data
                                        const
                                        myArray =
                                        [
                                        1
                                        ,
                                        2
                                        ,
                                        3
                                        ,
                                        4
                                        ]
                                        ;
                                        const
                                        barbieDollNamesArray =
                                        [
                                        "Barbie"
                                        ,
                                        "Ken"
                                        ,
                                        "Midge"
                                        ,
                                        "Allan"
                                        ,
                                        "Skipper"
                                        ]
                                        ;
                                        // Array indexes starts at 0.
                                        console.
                                        log
                                        (
                                        myArray[
                                        0
                                        ]
                                        )
                                        ;
                                        // output: 1
                                        console.
                                        log
                                        (
                                        barbieDollNamesArray[
                                        2
                                        ]
                                        )
                                        ;
                                        // output: "Midge"
                                    
                                

See also

Updated on April 20, 2024 by Datarist.