JS循环

最新推荐文章于 2024-05-28 10:32:37 发布

原创最新推荐文章于 2024-05-28 10:32:37 发布 · 197 阅读

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#JS

第三章嵌套循环

第一节 while嵌套循环

打印8*10表格

<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <meta name="Generator" content="EditPlus®">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <script>
  for (var i=0;i<=7;i++)
  {
  	  if(i==0)
  	  {
  		  document.write("<table border='1' width='600'>");
  	  }
  	  document.write("<tr>");
  	  for (var j=0;j<=9;j++)
  	  {
  		  document.write("<td style='width:60px;'>"+i+"-"+j+"</td>");
  	  }
	  document.write("</tr>");
  }
  document.write("</table>");
  document.write("<hr/>");
  var i=0;
  
   while (i<=7)
  {
	  if(i==0)
	  {
		  document.write("<table border='1' width='600'>");
	  }
	  if(i%2==0)
	  {
		document.write("<tr style='background-color:lightblue;'>");
	  }
	  else
	  {
		document.write("<tr>");
	  }
	  var j=0;
	  while (j<=9)
	  {
		  document.write("<td style='width:60px;'>"+i+"-"+j+"</td>");
		  j++;
	  }
	  document.write("</tr>");
		i++;
  }
  document.write("</table>");
  </script>
  <title>Document</title>
 </head>
 <body>
  
 </body>
</html>

第二节 for嵌套循环

<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <meta name="Generator" content="EditPlus®">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <title>Document</title>
  <script>
  for (var i=0;i<5;i++)
  {
	  for (var k=1;k<=4-i;k++)
	  {
		  document.write("&nbsp&nbsp");
	  }
	  for (var j=0;j<=i;j++)
	  {
		  document.write("*");
	  }
	  document.write("<br/>");
  }
  document.write("<hr/>");
  for (var i=0;i<5;i++)
  {
	  for (var j=0;j<=i;j++)
	  {
		  document.write("*");
	  }
	  document.write("<br/>");
  }
  document.write("<hr/>");
   for (var i=0;i<5;i++)
  {
	  for (var j=0;j<5-i;j++)
	  {
		  document.write("*");
	  }
	  document.write("<br/>");
  }
  document.write("<hr/>");
 for (var i=0;i<5;i++)
  {
	  for (var k=0;k<=i;k++)
	  {
		  document.write("&nbsp&nbsp");
	  }
	  for (var j=0;j<5-i;j++)
	  {
		  document.write("*");
	  }
	  document.write("<br/>");
  }
  </script>
 </head>
 <body>
  
 </body>
</html>