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@@ -7,7 +7,7 @@ let mut b = 2; // 将2绑定到变量b
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let some_number = Some(2); // 将Some(2)绑定到some_number
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```
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### 3.2.2 变量
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### 3.1.2 变量
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Rust中变量分为不可变变量和可变变量。不可变变量不能对其进行二次绑定,可变变量可以对其进行二次绑定。
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- 不可变变量定义方式如下:
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