abstract：var a = 12; //數(shù)值類型var b = 'php'; //字符串var c = true;  //布爾類型var d = new Array (); //數(shù)組var person = {firstnname:'John',id:5566};  //對(duì)象var e = null; //空undefined //未定義

var a = 12; //數(shù)值類型

var b = 'php'; //字符串

var c = true;  //布爾類型

var d = new Array (); //數(shù)組

var person = {firstnname:'John',id:5566};  //對(duì)象

var e = null; //空

undefined //未定義

Correcting teacher：韋小寶Correction time：2019-02-01 09:52:39
Teacher's summary：你這些的也太簡(jiǎn)單了吧 連個(gè)script標(biāo)簽都懶得給的么?