<html><body><h2>使用 const 声明数组</h2><p id="demo"></p><script>const cars = ["Tesla", "Volvo", "BMW"];// 此处 cars[0] 是 "Tesla"{ const cars = ["Toyota", "Volvo", "BMW"]; // 此处 cars[0] 是 "Toyota"}// 此处 cars[0] 是 "Saab"document.getElementById("demo").innerHTML = cars[0];</script></body></html>