<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>页面输出三角形</title>
<style>
* {
padding: 0;
margin: 0;
}
</style>
</head>
<body>
<script>
for (var i = 1; i <= 10; i++) {
for (var m = 1; m <= (10 - i); m++) {
document.write(' ');
}
for (var j = 1; j < i * 2; j++) {
document.write('＊');
}
document.write('<br>');
}
</script>
</body>
</html>
