<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Math </title>
<script type="text/javascript">
var mynum=Math.random()*10;
document.write(mynum);
document.write(Math.round(mynum));
</script>
</head>
<body>
</body>
</html>
可以出现随机数 但是不能出现四舍五入的
2016-11-20
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Math </title>
<script type="text/javascript">
var mynum=Math.random()*10;
document.write(mynum+"<br />");//你这里忘了加换行，导致两行数字在一行，当然不能四舍五入了
document.write(Math.round(mynum));
</script>
</head>
<body>
</body>
</html>
举报
