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                [TOC] # 創建函數的方式 **函數一執行得到的就是返回值,如果沒有返回值默認是undefined** ## 1.命名函數 ```javascript function fun(){ console.log("我是命名函數"); } fun(); console.log(fun.name);//fun ``` ## 2. 匿名函數(匿名函數表達式) ```javascript var fun2 = function () { console.log("我是匿名函數"); } fun2(); console.log(fun2.name);//fun2 ``` ## 3.通過new方式創建 ```javascript var fun3 = new Function("console.log(‘我是通過new 方式’)); fun3(); console.log(fun3.name);//anonymous ``` ## 4.命名函數表達式 ```javascript var fun4 = function f5(){ console.log("我是命名函數表達式"); } fun4(); console.log(fun4.name);//f5 ``` ### 面試題 ![](https://img.kancloud.cn/73/af/73af47b47c1397102299f70453562341_932x127.png)
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