Appearance
数组
包含多个值的对象
创建数组
用方括号构成，其中包含用逗号分隔的元素列表
javascript
let shopping = ["bread", "milk", "cheese"];
访问和修改数组元素
javascript
let shopping = ["bread", "milk", "cheese"];
console.log(shopping[0]); //bread
shopping[0] = "tahini";
console.log(shopping); // ['tahini', 'milk', 'cheese']
获取数组长度
javascript
let shopping = ["bread", "milk", "cheese"];
console.log(shopping.length); //3