Do while in java program
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Java do while loop
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Java do-while loop is used to execute a block of statements continuously until the given condition is true. The do-while loop in Java is similar to while loop except that the condition is checked after the statements are executed, so do while loop guarantees the loop execution at least once.
Java do while loop
The expression for the do-while loop must return a boolean value, otherwise, it will throw compile-time error.
do while java flow diagram
Java do-while loop example
package com.journaldev.javadowhileloop; public class JavaDoWhileLoop < public static void main(String[] args) < int i = 5; do < System.out.println(i); i++; >while (i > 
do while true java
We can create an infinite loop by passing boolean expression as true in the do while loop. Here is a simple do while java infinite loop example.
package com.journaldev.javadowhileloop; public class DoWhileTrueJava < public static void main(String[] args) throws InterruptedException < do < System.out.println("Start Processing inside do while loop"); // look for a file at specific directory // if found, then process it, such as inserting rows into database System.out.println("End Processing of do while loop"); Thread.sleep(5 * 1000); >while (true); > > Note that you will have to manually quit the application to stop it, using Ctrl+C if the program is executed in the terminal. If you execute the program in Eclipse IDE then there is a red color button to terminate the program.
do while vs while loop
The only time you should use a do-while loop is when you want to execute the statements inside the loop at least once, even though condition expression returns false. Otherwise, it’s always better to use a while loop. Java while loop looks cleaner than a do-while loop. That’s all for java do while loop. You should also look into java for loop and java continue statement. Reference: Oracle Documentation
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Do while in java program
Честно говоря, я уже сдался и просто беру готовые решения, когда не могу решить 🙁 Просто иногда ошибка в коде настолько неявная, что ничего, кроме недовольства, решение уже не даёт.
Задача не сложная, сложно ее понять( int number = 4; Вывести на экран строку number(т.е 4) раз
Что-то тут Pascal прямо красавчик по сравнению с Java. Нужно завязывать с примерами из Паскаля, а то засмеют. /* Хорошего не бывает много */ public class Solution < public static void main(String[] args) < Scanner sc = new Scanner(System.in); String text = sc.nextLine(); int number = sc.nextInt(), count = number; do < System.out.println(text); count = ((number = 5)) ? 0 : count - 1; > while (count != 0); > > Я сделал через break Scanner console = new Scanner(System.in); String text = console.nextLine(); int x = console.nextInt(); int i=1; do < i++; System.out.println(text); if (x<=0 || x>=5) > while (i<=x);
Да, «совсем нет отличий». Всего лишь, в do-while проверка условия всегда происходит ПОСЛЕ тела цикла, а в обычном while — всегда ПЕРЕД ним 🤡. Хоть про минимум одно выполнение сказали.
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Java Do-While Loop
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1. Overview
In this article, we’ll look at a core aspect of the Java language – executing a statement or a group of statements repeatedly using a do-while loop.
2. Do-While Loop
The do-while loop works just like the while loop except for the fact that the first condition evaluation happens after the first iteration of the loop:
do < statement; >while (Boolean-expression);Let’s have a look at a simple example:
3. Conclusion
In this quick tutorial, we explored Java’s do-while loop.
As always, examples can be found over on GitHub.
Slow MySQL query performance is all too common. Of course it is. A good way to go is, naturally, a dedicated profiler that actually understands the ins and outs of MySQL.
The Jet Profiler was built for MySQL only, so it can do things like real-time query performance, focus on most used tables or most frequent queries, quickly identify performance issues and basically help you optimize your queries.
Critically, it has very minimal impact on your server’s performance, with most of the profiling work done separately — so it needs no server changes, agents or separate services.
Basically, you install the desktop application, connect to your MySQL server, hit the record button, and you’ll have results within minutes: