问题描述
我知道 switch / select 语句在每种情况下都会自动中断。我想知道，在下面的代码中：
I know that switch/select statements break automatically after every case. I am wondering, in the following code:
for {
switch sometest() {
case 0:
dosomething()
case 1:
break
default:
dosomethingelse()
}
}
break 语句是否退出 循环还是 switch 块？
Does the break statement exit the for loop or just the switch block?
推荐答案
break语句终止执行最里面的 for，
switch或 select语句。
A "break" statement terminates execution of the innermost "for", "switch" or "select" statement.
BreakStmt = "break" [ Label ] .
如果有标签，则必须为 for， switch $的标签b $ b或 select语句，即执行终止
的语句（§For语句，§Switch语句，§Select语句）。
If there is a label, it must be that of an enclosing "for", "switch" or "select" statement, and that is the one whose execution terminates (§For statements, §Switch statements, §Select statements).
L:
for i < n {
switch i {
case 5:
break L
}
}
因此，示例中的 break 语句终止开关语句，即最里面的语句。
Therefore, the break statement in your example terminates the switch statement, the "innermost" statement.
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