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求老师讲解

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用户5619697451

#1 Created at ... [Delete] [Delete and Lock User] 
boolean isPrimaryStudent = age >= 6 && age <= 12;

和

boolean isPrimaryStudent = age >= 6 & age <= 12;

的区别！

Pone-z

#2 Created at ... [Delete] [Delete and Lock User]

& 也可以进行布尔运算，不过它会计算两边的值然后进行布尔运算，就相当于没有短路运算的 &&，我觉得是这样

YANGZY1202

#3 Created at ... [Delete] [Delete and Lock User]

& 和 | 是位运算——可以参见本章前两节的介绍；

&& 和 || 才是关系运算（布尔运算）

ELias丿纯黑

#4 Created at ... [Delete] [Delete and Lock User]

第一个 只要左边为false就不会进行右边的计算了，所以叫短路运算符

第二个，无论如何都会将两边的进行计算，即便左边为false

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