There are several ways to assign values ​​to arrays in JavaScript

There are three ways to assign values ​​to arrays: 1. After creating the array, use the form "array name [subscript] = value;" to assign values ​​one by one; 2. Use "var array name = new Array (value list );" statement assigns values ​​while creating the array; 3. Use the "var array name = [value list];" statement to assign values ​​while creating the array.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

JavaScript array assignment method

Method 1:

First create an empty array:

var arr = new Array(); //空数组
var arr = new Array(2); //当给Array()函数出入一个参数时，可指定数组长度（可以不指定，js的数组是变长的，会随着加入的元素改变数组的长度）
var arr = []; //空数组

Assign a value to an empty array

arr[0] = 1;
arr[1] = 2;

Method 2:

Assign a value while creating an array

var arr = new Array(2,3);

Method 3:

Create an array and assign values ​​at the same time

var arr = [3,4];   //直接输入一个数组，也叫字面量数组

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