WebJun 14, 2016 · Using this means that I can create localized variables that will go out of scope though just using brackets without the do { } while (false); does that as well. However I use the do while because I need the break; capability as well. I would consider using this style under some of the following conditions. If the business logic that is being ... WebJun 10, 2024 · 11. A while loop checks the condition (well, the expression) behind the while before each iteration and stops executing the loop body when the condition is False. So while False means that the loop body will never execute. Everything inside the loop is "dead code". Python-3.x will go so far that it "optimizes" the while -loop away because of ...

do...while - JavaScript MDN - Mozilla Developer

Web它的格式是：. do. {. 语句; } while (表达式); 注意，while 后面的分号千万不能省略。. do…while 和 while 的执行过程非常相似，唯一的区别是：“do…while 是先执行一次循环体，然后再判别表达式”。. 当表达式为“真”时，返回重新执行循环体，如此反复，直到 ... WebDec 2, 2024 · C语言中do while与while与for循环用法while循环的用法while循环的结构如下while （表达式）{ 语句}；当表达式为真，执行下面的语句。语句执行完之后再判断表达式是否为真，若是真则继续执行下面的语句。反之跳出循环。do while循环的用法do while循环的结构如下do{ 语句}while（表达式）；do while循环与while ... regent life cash back

宏中的 do-while 和 if-else 语句是干嘛用的 - 腾讯云开发者社区-腾 …

WebFeb 25, 2024 · Explanation. statement is always executed at least once, even if expression always yields false. If it should not execute in this case, a while or for loop may be used.. If the execution of the loop needs to be terminated at some point, a break statement can be used as terminating statement.. If the execution of the loop needs to be continued at the … WebSep 3, 2024 · 今天看代码时发现个不太理解的风格，一些代码都分段包含在了do {...}while (false)区间里。. 一般来说，使用do while是为了循环，但这里循环条件是false，根本就不会有循环，那么意义何在？. 上网查了下后得到结论：使用do {...}while (false)结构可以简化多 … Web当然这里的例子可能不太恰当，没有体现出使用场合的必要性，即不用 do while false 也能实现同样的效果。其实这种看似怪异的写法，主要是用来取代函数作用域内 goto（JavaScript 中没有 goto 关键字）的作用，再不使用 goto ... regent lighting catalogue