1.示例代码（包含注释）:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>JS-数据类型</title>
</head>
<body>
<script>
//利用``包裹起来的字符串被称为模板字符串
//在``中引入变量可以采用${}里面写变量的名字引入
let name = '张三';
let age = 19;
console.log(`我叫${name},我今年已经${age}岁了`);
</script>
</body>
</html>2.运行效果:
