Switch必须赋初始值，值与每个case值匹配。这句话中的“赋初始值”是什么意思？

Answer 1

Switch must be assigned an initial value, and the value matches each case value. What does "assign an initial value" mean in this sentence? -PHP Chinese website Q&A-Switch must be assigned an initial value, and the value matches each case value. What does "assign an initial value" mean in this sentence? -PHP Chinese website Q&A

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Answer 2

注意语法：x 就是需要赋初始值的变量，只有该值被赋值后，后面的case代码块才能根据其值执行相应的代码内容

switch(x){

case x值1：

执行的代码块1；

break；

case x值2：

执行的代码块2；

break；

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