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                **函數聲明** ![](https://img-blog.csdn.net/2018072520351760?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0b3J5b2Nv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70) **函數表達式** ![](https://img-blog.csdn.net/2018072520351757?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3N0b3J5b2Nv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70) **區別** 1、函數聲明會被提升到當前作用域的頂部,函數表達式則不會。 2、函數聲明一定會有函數名,而函數表達式一般不會有函數名。 3、函數聲明不是一個完整的語句,所以不能出現在if-else,for循環,inally,try catch語句以及with語句中,
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