javascript教程系列7:算術運算符

原創 邢晋宇 2020-07-02 03:20

1  運算符: 加號+

如果是數字類型的變量相加，那麼結果爲數字類型; 

如果是非數字類型的變量相加，結果爲字符串類型

2  減號-

 如果是非數字類型的變量相減結果爲  NaN

3 乘號 *

如果是非數字類型的變量相減結果爲  NaN

4 除號/

如果0作爲除數，結果爲infinity（無窮大）

5 取餘 %

 

獲取餘數

6 括號 ()

優先級  有括號先計算括號裏面的值

 

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