WebA switch statement is just a bunch of labels and a goto done by the compiler depending on the value of the thing inside the switch test. When you have a local variable in a function, anywhere past the declaration of that variable you can use it. For instance: int a; // can use a now. However, in a switch statement, if you have a local variable: WebThe following rules apply to a switch statement −. The expression used in a switch statement must have an integral or enumerated type, or be of a class type in which the class has a single conversion function to an integral or enumerated type. You can have any number of case statements within a switch. Each case is followed by the value to be ...
Golang 多路条件语句 Switch 语法详解 - 简书
WebMay 16, 2015 · 当碰到多个常量使用同一语句块时，我习惯性用了pascal的写法，即如case 1..3,5这样子，而正确的写法应该是：. 1 case 1: case 2: case 3: 2 { 3 for (i= 0 ;i WebDec 27, 2011 · switch(condition){ case case1: // do action for case1 break; case case2: case case3: // do common action for cases 2 and 3 break; default: break; } Share … burgon and ball wholesale
switch语句中，case的后面为什么必须是常量？ - 知乎
WebMay 4, 2024 · 一个 switch case 条件结构如下所示：. switch simpleStatement; condition { case expression1,expression2: statements case expression3: statements default: … Web避免一些不必要的分支，让代码更精炼。 其他方法. 除了上面提到的方法，我们还可以通过一些设计模式，例如策略模式，责任链模式等来优化存在大量if,case的情况，其原理会和表驱动的模式比较相似，大家可以自己动手实现一下，例如我们在Netty的使用过程中，可能会出现需要大量判断不同的命令 ... WebAug 21, 2002 · 1.if和switch判断条件的数据类型不同，if的判断条件数据类型是布尔类型，switch的判断条件数据类型一般是int类型。2.if elseif 流程语句中可以允许有多个判断 … burgon and ball trowel and fork set