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In js, you can use the array method to create an array. The specific method is: 1. Create an array through the constructor. The syntax format is "let array name=new Array();"; 2. Create through literals. Array, the syntax format is "let array name=[];".
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
1. Create an array through the constructor
Create an array of a specified size
let array name = new Array (array length) ;
Create an empty array
let array name = new Array();
Create an array of given data
let array name = new Array(data1, data2, data3...);
2. Create an array through literals
Create an empty array
let array name = [];
Create an array of given data
let array name = [data1, data2, data3...];
Sample code
<script> //通过构造函数创建数组 let arr1 = new Array(3); arr1[0] = 11; arr1[1] = 12; arr1[2] = 13; let arr2 = new Array(); arr2[0] = 20; arr2[1] = 21; arr2[2] = 22; let arr3 = new Array(31, 32, 33); console.log(arr1); console.log(arr2); console.log(arr3); //通过字面量创建数组 let arr4 = []; arr4[0] = 41; arr4[1] = 42; arr4[2] = 43; let arr5 = [51, 52, 53]; console.log(arr4); console.log(arr5); </script>
Running effect
[Recommended learning: javascript advanced tutorial]
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