菜鸟教程在线编辑器

AI 编程工具
 
                <!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>菜鸟教程(runoob.com)</title>
</head>
<body>



<p id="demo1"></p>
<p id="demo2"></p>

<script>
const array1 = [5, 12, 8, 130, 44];
 
let index1 = 2;
 
strt1 = `索引号为 ${index1} 的值为 ${array1.at(index1)}`;
document.getElementById("demo1").innerHTML = strt1;
 
let index2 = -2;
 
strt2 = `索引号为 ${index2} 的值为 ${array1.at(index2)}`;
document.getElementById("demo2").innerHTML = strt2;
 
</script>

</body>
</html>
              