lovecoding
/
web0715


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 外层循环控制输出的行数
        for(var i=0;i<5;i++){
            //内层循环控制每一行的内容
            for(var j=0;j<i+1;j++){
                document.write(j+1);
                document.write("&nbsp");
            }
            document.write("<br>")
        }
    </script>
</body>
</html>