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>
        function foo(n) {
            for (var i = 0; i < n; i++) {
                for (var k = 0; k < n - i; k++) {
                    document.write("&nbsp;");
                }
                for (var j = 0; j < i + 1; j++) {
                    document.write("*");
                    document.write("&nbsp;")
                }
                document.write("<br>")
            }
        }
        var num = window.prompt("请输入行数");
        foo(num);

    </script>
</body>

</html>