65 lines
2.1 KiB
Markdown
65 lines
2.1 KiB
Markdown
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---
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title: Assignment Operators
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localeTitle: 分配运营商
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---
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# 分配运营商
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赋值运算符，顾名思义，为变量赋值（或重新赋值）。虽然赋值运算符有很多变化，但它们都是基本赋值运算符的构建。
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## 句法
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`x = y;` |说明|必要性 ：---------：|：---------------------：|：---------：
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`x` |变量|需要
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`=` |分配操作员|需要
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`y` |赋值给变量的值需要
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## 例子
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```
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let initialVar = 5; // Variable initialization requires the use of an assignment operator
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let newVar = 5;
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newVar = 6; // Variable values can be modified using an assignment operator
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```
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## 变化
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其他赋值运算符是使用变量（由上面的x表示）和值（由上面的y表示）执行某些操作的简写，然后将结果赋给变量本身。
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例如，下面是加法赋值运算符的语法：
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```
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x += y;
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```
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这与应用加法运算符并将总和重新分配给原始变量（即x）相同，可以通过以下代码表示：
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```
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x = x + y;
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```
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为了使用实际值来说明这一点，下面是使用加法赋值运算符的另一个示例：
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```
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let myVar = 5; // value of myVar: 5
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myVar += 7; // value of myVar: 12 = 5 + 7
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```
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## Javascript的赋值运算符的完整列表
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运营商|语法|长版
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\------------------------------- | --------- | -------------
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作业| x = y | x = y
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添加任务| x + = y | x = x + y
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减法赋值| x - = y | x = x - y
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乘法赋值| x \* = y | x = x \* y
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部门分配| x / = y | x = x / y
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剩余任务| x％= y | x = x％y
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指数分配| x \*\* = y | x = x \*\* y
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左移分配| x << = y | x = x << y 右移分配| x >> = y | x = x >> y
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无符号右移分配| x >>> = y | x = x >>> y
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按位AND赋值| x＆= y | x = x＆y
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按位异或分配| x ^ = y | x = x ^ y
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按位OR赋值| x | = y | x = x | ÿ
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### 更多信息：
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[MDN链接](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Assignment_Operators#Assignment)
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[MSDN链接](https://docs.microsoft.com/en-us/scripting/javascript/reference/assignment-operator-decrement-equal-javascript)
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