I've been examining some PHP code today and I've noticed the usage of do-while with breaks instead of if-else. What are the advantages of it? Code readability? Speed? Anything else?
3条回答 默认 最新
douyuan4697 2011-02-28 20:35关注do/while loops guaranteed that the body of the do/while is executed at least once, after which the loop condition is checked.
On the flip side,
ifguarantees that the code will not execute at all if the condition fails.Internally there's no difference to them, except for the point at which the loop's conditionals are checked.
本回答被题主选为最佳回答 , 对您是否有帮助呢?解决 无用评论 打赏举报
分享
- 2011-02-28 20:30回答 3 已采纳 do/while loops guaranteed that the body of the do/while is executed at least once, after which the
- 2018-01-09 12:52回答 1 已采纳 You need to use the logical AND operator if you want to check the both like : if(!exists('voucher
- 2014-10-21 20:49回答 1 已采纳 So I worked around this issue by removing the class and function and just including the php code i
- 2022-04-16 17:38菜鸟学Python的博客 在某些编程语言中，例如 C/C++、C#、PHP、Java、JavaScript 等等，do-while 是一种基本的循环结构。它的核心语义是：先执行一遍循环体代码，然后执行一遍条件语句，若条件语句判断为真，则继续执行循环体代码，并...
- 2014-06-30 03:41回答 1 已采纳 Massive error on my part, turns out whilst there were three hashtags in the hashtags table there w
- 2014-09-24 11:46回答 1 已采纳 Check this example and try to modify your code, $sql = ''; $sql = "SELECT * FROM tablename WHERE
- 2017-12-07 08:52回答 1 已采纳 When you request a login to google you add scope in that request. Google has better answer. Googl
- 2019-03-25 20:41sps98的博客 while 用于执行循环，具体语法是 while( 条件 ) { ... 条件成立时要执行的循环语句 ... } do-while 同样也用于执行循环，具体用法如下 do { ...} while( 条件 );...do-while 是先执行循环语句，再判断循环条...
- 2014-11-19 17:41回答 2 已采纳 This is an easy one: You shouldn't echo the_permalink() and the_title() as they already echo thei
- 2017-09-23 16:00回答 1 已采纳 Sorry I have no idea what the code is doing but you are basically not setting arrays into the SESS
- 2015-08-22 14:03回答 1 已采纳 Maybe it's not the while loop, but the mysqli_query Seems like the arguments in the second query h
- 2021-04-12 14:09岁月未染的博客 do while语句的用法是：首先执行循环体中的语句；然后再判断条件是否为真，如果为真则继续循环，如果为假，则终止循环。do while语句的用法是：1、do-while循环与while循环的不同在于：它先执行循环体中的语句，然后...
- 2016-10-11 20:12回答 1 已采纳 The actual error was the new variable in the while loop. The query's fetch variable name should ha
- 2018-09-02 22:21码走江湖的博客 /** 用for和while循环 do-while分别计算100以内奇数和偶数的和，并输出。 */ public class ForWhileDoWhile { public static void main(String[] args) { // 1.for int sumOddi = 0;// 奇数和 int sumEveni = 0;...
- 2022-10-25 11:2845ºｄｅ天空的博客 分别利用do-while、while和for循环嵌套if-else函数分别计算1000以内的奇数和偶数之和
- 没有解决我的问题, 去提问
悬赏问题
- ¥100 求数学坐标画圆以及直线的算法
- ¥100 c语言，请帮蒟蒻写一个题的范例作参考
- ¥15 名为“Product”的列已属于此 DataTable
- ¥15 安卓adb backup备份应用数据失败
- ¥15 eclipse运行项目时遇到的问题
- ¥15 关于#c##的问题：最近需要用CAT工具Trados进行一些开发
- ¥15 南大pa1 小游戏没有界面，并且报了如下错误，尝试过换显卡驱动，但是好像不行
- ¥15 自己瞎改改，结果现在又运行不了了
- ¥15 链式存储应该如何解决
- ¥15 没有证书，nginx怎么反向代理到只能接受https的公网网站