為什么什么都不顯示
<!DOCTYPE? HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>數(shù)組</title>
<script type="text/javascript">
?//創(chuàng)建數(shù)組
??? var? arr = ["*","##","***","&&","****","##*"];
?? arr[7] = "**";
?//顯示數(shù)組長(zhǎng)度
?alert(arr.length);
?//將數(shù)組內(nèi)容輸出，完成達(dá)到的效果。
?for(var i=0,i<arr.length,i++)
{
??? document.write(arr[i]+"<br/>");
}
</script>
</head>
<body>
</body>
</html>
2020-02-17
for循環(huán)里面的是分好，不是逗號(hào)，你在試試看