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<!DOCTYPE html> <html> <body> <h2>JavaScript 常量</h2> <p>声明常量数组不会使元素不可更改：</p> <p id="demo"></p> <script> // Create an Array: const cars = ["Saab", "Volvo", "BMW"]; // Change an element: cars[0] = "Toyota"; // Add an element: cars.push("Audi"); // Display the Array: document.getElementById("demo").innerHTML = cars; </script> </body> </html>