📄 09.html
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<html>
<head>
<title>循环语句</title>
</head>
<body>
循环语句：<br>
<script language="JavaScript">
var sum = 0;
var i = 0;
<!--for循环-->
for(i=0; i<=100; i++){
sum +=i;
}
document.write("<hr>for循环:" + sum);
<!--while循环-->
sum = 0;
i = 0;
while(i<=100){
sum +=i;
i++;
}
document.write("<hr>while循环:" + sum);
<!--do-while循环-->
sum = 0;
i = 0;
do{
sum +=i;
i++;
}while(i<=100);
document.write("<hr>do-while循环:" + sum);
<!--for-in循环-->
document.write("<hr>for-in循环:" );
document.write("<ul>");
var a = new Array(3);
a[0] = "苹果";
a[1] = "香蕉";
a[2] = "杨桃";
for(var s in a){
document.write("<li>" + a[s] + "</li>");
}
document.write("</ul>");
</script>
</body>
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