A question of JavaScript About arr

题目

A question of JavaScript About arr
For example,this is a part of the program.
Var arr,level=9
arr=new Array()
arr[0]=new Array()
Question:What's the meaning of arr?How to use it?

答案

javascript is a Dynamic Scripting Languagevar arr; // means that arr can be an integer,time(),array,etc.arr = new Array() // means now arr is an arrayarr[0] = new Array() // means that the first value...