abstract： <script type="text/javascript"> var x,y; x = 5; y = 10; document.write(x+y); document.write('<br/>'); va
<script type="text/javascript">
var x,y;
x = 5;
y = 10;
document.write(x+y);
document.write('<br/>');
var str = "5";
document.write(x==str);
var number_var = 12.33;
document.write('<br/>');
document.write(number_var*3);
document.write('<br/>');
var data = {name:'Jack',age:13};
document.write("姓名："+data.name+" 年龄："+data.age);
document.write('<br/>');
document.write(typeof(data));
document.write('<br/>');
document.write(typeof(number_var));
</script>结果如下：
Correcting teacher：天蓬老师Correction time：2019-02-18 15:07:32
Teacher's summary：document.write('<br/>');
document.write(number_var*3);
document.write('<br/>');
var data = {name:'Jack',age:13};,
以后,尽可能: console.log() 到控制台输出结果