abstract：<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title>js变量</
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>js变量</title>
</head>
<body>
<script>
var a="3";
document.write(a+"</br>")
var b=4;
document.write(b)
</script>
</body>
</html>
Correcting teacher：韦小宝Correction time：2019-03-09 13:05:50
Teacher's summary：写的还算是可以 注意声明变量时变量名的命名规则哦