<code>switch ($para1) { case 1: return self::otherFunction($para2); break; }</code>
例子中,如果满足case 1,那么最后的break还需要吗?
回复内容:
<code>switch ($para1) { case 1: return self::otherFunction($para2); break; }</code>
例子中,如果满足case 1,那么最后的break还需要吗?
不需要了,如果在case 中使用 return 作为结束,break就是不必要的了。
有return肯定不需要下面的break了
按照楼主的写法,break就不需要了,因为程序在return时候跳转,后面的代码都不会被执行了,所以break有没有一点关系都没有。
从题注的代码上看,break是不需要的,因为return后续的代码已经不会执行了。
加上break永远不会错,不加break有时候会出错。推荐不管什么情况都加上break,这样一起工作的其他小伙伴也能更好的理解代码。
如果你只有一个选项,当然不需要,如果后面还有其他的case选项,是需要的,不然的话程序会顺序执行到下面一个选项,直到遇到一个break或结束,有时也会应用这种特性来处理多个选项一样处理方式的情况,即多个情况下不写处理方式和break,只在最后一个case内添加处理方式。
评论不会贴代码,我修改一下:如下例:
<code>switch( $i ) { case 1: case 2: case 3: $c =555; break; default: $c =2; }</code>
你可以试一下这个例子~
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