09.html

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HTML
50
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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>
</html>

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