亚洲国产日韩欧美一区二区三区,精品亚洲国产成人av在线,国产99视频精品免视看7,99国产精品久久久久久久成人热,欧美日韩亚洲国产综合乱

Javascript 變量

??? 2019-01-31 23:13:15 240
????：<html><head><title>JS基礎(chǔ)</title></head><body><script>var a = "I LOVE U";var b = 1314;document.write(a+b);console.log(typeof(a));console.log(typeof(b)

<html>

<head>

<title>JS基礎(chǔ)</title>

</head>

<body>

<script>

var a = "I LOVE U";

var b = 1314;

document.write(a+b);

console.log(typeof(a));

console.log(typeof(b));

</script>

</body>

</html>

?? ???：滅絕師太?? ??：2019-02-01 09:58:40
???? ??：練習(xí)過于簡單 變量的類型那么多,都要測試看看效果哦

??? ??

?? ??