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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ![](https://img.kancloud.cn/97/98/979859c62fbfebe501abe05604e0f521_2114x1178.png) ``` // number數字類型 let n = 10; n = 10.5; n = -10; n = 0; n = NaN; //=>NaN:not a number 非有效數字 n = Infinity; //=>正/負無窮大 -Infinity [?n?f?n?ti] // string字符串:基于單引號、雙引號、反引號(TAB上面的撇)包起來的都是字符串 let str = ''; str = '19'; str = "珠峰培訓"; str = `我是ES6中新增的模板字符串,有助于字符串的拼接`; str = '[object Object]'; // boolean布爾:true / false let boo = true; boo = false; // 空 let nu = null; nu = undefined; let un; //=>默認值就是undefined // Symbol:每一個Symbol()都是一個唯一值 let x = Symbol('珠峰'); let y = Symbol('珠峰'); console.log(x == y); //=>false ``` ``` // object普通對象:大括號包起來,里面有零到多組屬性名和屬性值(鍵值對), // 這些屬性名和屬性值可以描述當前對象的特征(鍵:值,多組鍵值對用逗號分隔) let obj = { name: '珠峰培訓', age: 10, teachers: 30 }; // Array數組對象:中括號包起來, // 逗號分隔數組中每一項的值(每一項的值可以是任意類型) let arr = \[10, '字符串', true, null\]; // RegExp正則對象:兩個斜杠包起來一大堆你看不懂的符號就是正則 O(∩\_∩)O哈哈~ let reg = /$\[+-\]?(\\d|(\[0-9\]\\d+))(\\.\\d+)?^/; // function函數 function func(x, y) { let total = x + y; return total; } // ES6中的 Arrow Function 箭頭函數 let fn = () => { }; ```
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