目前唯一正確答案...
<!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[1] = '**';
?arr[3] = '****';
?//顯示數(shù)組長(zhǎng)度
?alert("數(shù)組長(zhǎng)度為："+arr.length);
?//將數(shù)組內(nèi)容輸出，完成達(dá)到的效果。
?for(var i = 0; i < 4; i++){? ??
? ? ?document.write(arr[i] + '<br />');
?}
</script>
</head>
<body>
</body>
</html>
2019-01-23
我的是對(duì)的
<!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(i=0;i<arr.length;i++){
? ? document.write(arr[i]+"<br/>");
}
</script>
</head>
<body>
</body>
</html>
2019-01-19
? ? var? arr = ['*','##',"***","&&","****","##*"];
? ?arr[7] = "**";
?//顯示數(shù)組長(zhǎng)度
?
?//將數(shù)組內(nèi)容輸出，完成達(dá)到的效果。
for(var i=0;i<6;i++){
? ? if(i==1){
? ? document.write(arr[7]+"<br/>");
? ? ? ??
? ? }
? ? if(i%2==0){
? ? document.write(arr[i]+"<br/>");
? ? }
? ??
}
2019-01-14
<!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 myarr=['*','**','***','****'];
?for(var i=0;i<myarr.length;i++){
? ? ?document.write(myarr[i]+"<br>");
?}
</script>
</head>
<body>
</body>
</html>