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This article introduces the knowledge of "what are the three methods of creating arrays in js". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

This tutorial operating environment: windows7 system, jquery3.2.1 version, DELL G3 computer.

1. Create using array literal notation

Var arr4 = []; / / create an empty array var arr5 = [20]; / / create an array containing an item of data of 20 var arr6 = ["lily", "lucy", "Tom"]; / / create an array of 3 strings

2. Create an array through Array ()

Var arr=new Array (); / empty array var arr1 = new Array (4); / / indicates that the length of the specified array is 4var arr2 = new Array; / / represents the element console.log (arr2) in the array.

3. Specified length (for general use)

Var arr4=new Array (2); / / specifies the length of the array arr [0] = "value1"; arr [1] = "value2;" what are the three ways to create an array in js? thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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