freeCodeCamp/guide/chinese/certifications/javascript-algorithms-and-data-structures/basic-data-structures/access-property-names-with-bracket-notation/index.md

title	localeTitle
Access Property Names with Bracket Notation	使用括号表示法访问属性名称

使用括号表示法访问属性名称

方法：

• 使用括号表示法只需在checkInventory()函数中编写return语句。
• 以下代码块演示了所需的语法。

例：

let juice = { 
  apple: 1.15, 
  orange: 1.45 
 }; 
 function checkInventory(scannedItem) { 
  return juice[scannedItem]; 
 } 

解：

let foods = { 
  apples: 25, 
  oranges: 32, 
  plums: 28, 
  bananas: 13, 
  grapes: 35, 
  strawberries: 27 
 }; 
 // do not change code above this line 
 
 function checkInventory(scannedItem) { 
  // change code below this line 
  return foods[scannedItem]; 
 } 
 
 // change code below this line to test different cases: 
 console.log(checkInventory("apples"));