一、代码如下
二、执行效果如下
<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<body>
<h1>我的第一张网页
</h1>
<p id="demo1"></p>
<script>
var a, b, c;
a = 5; b = 6; c = a + b;
document.getElementById("demo1").innerHTML = c;
</script>
</body>
</html>
转载于:https://www.cnblogs.com/tianpan2019/p/11302736.html
