写了几篇笔记，才知道掘金的代码块这么写啊？！！！这几天在家就是幼儿园园长。 趁孩子睡觉，起来敲敲。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
function sum(n)
{
var m = 0;
for (var i = 1; i <= n; i++)
{
m += i;
}
document.write(n + "以内所有整数之和为：" + "</br>");
}
sum(50);
sum(100);
sum(150);
sum(200);
sum(250);
</script>
</head>
<body>
</body>
</html>
展示如下
