java do-while loop example - Brave Search

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Java Do/While Loop

The do/while loop is different: it will always run the code block at least once, even if the condition is false from the start. In the example below, the variable i starts at 10, so i < 5 is false immediately.

beginnersbook.com › 2015 › 03 › do-while-loop-in-java-with-example

do-while loop in Java with example

Here we have an integer array and we are iterating the array and displaying each element using do-while loop.

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Java do..while loops explained with examples - Guide - The freeCodeCamp Forum

Do…While Loop The do while is similar to the while loop, but the group of statements is guranteed to run at least once before checking for a given condition. An important thing to note is ‘while’ loop is an exit control loop. while(it will not necessarily be executed), ‘do while’ ... More on forum.freecodecamp.org

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September 9, 2019

do while loop - Java Basic

Tanguy Muffat is having issues with: Hi guys, I would need you support. I'm stucked under challenge 2/3 where I'm being asked: "Now continually prompt the user in a do whil... More on teamtreehouse.com

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November 20, 2017

Java Using do-while loop - Stack Overflow

You should use a do-while. A loop and and repeatable actions. That is not that difficult. You need to put the input of an Integer into the loop and check if it is the highest or lowest so far. The loop ends after 5 inputs and you can print the highest and the lowest. Ok - now try again. ... import java... More on stackoverflow.com

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Java: When to use a While Loop?

Imagine you have a collection of 1,000,000 songs. You want to search for one song specifically, and return that song (or, if the song doesn't exist in the collection, tell you it wasn't found). A for or for-each loop could accomplish that, but it's going to loop 1,000,000 times even if the song is the very first record checked, which is a huge waste of time and power. If you write a while loop and then have it stop when a matching record is found, it runs exactly as much as is necessary and no more. Another example -- imagine a simple text-based console app that reads input from a user and then prints it out on the screen, but then closes when they type "quit". If you put the steps of your program - asking the user for input, assigning it to a variable, and then printing it out - in a for/for-each loop, how do you know how many times to run it? A while loop that stops running when the user types "quit" lets the user flexibly quit whenever they want, whether on 0 entries or 200. There's a lot of other applications but hopefully these are useful to conceptualize at least. More on reddit.com

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geeksforgeeks.org › java › java-do-while-loop-with-examples

Java Do While Loop - GeeksforGeeks

The loop continues until the condition c <= 5 becomes false, after which the loop terminates. ... Note: The test_expression in a do-while loop must evaluate to a boolean value; otherwise, a compile-time error occurs.

Published 1 month ago

tutorialspoint.com › java › java_do_while_loop.htm

Java - do...while Loop

The following diagram shows the flow diagram (execution process) of a do while loop in Java - In this example, we're showing the use of a while loop to print numbers starting from 10 to 19.

programiz.com › java-programming › do-while-loop

Java while and do...while Loop

The do...while loop is similar to while loop. However, the body of do...while loop is executed once before the test expression is checked. For example,

w3schools.com › java › java_while_loop.asp

Java While Loop

How Tos Add Two Numbers Swap Two ... Loop Loop Through an Enum ... assert abstract boolean break byte case catch char class continue default do double else enum exports extends final finally float for if implements import instanceof int interface long module native new package private protected public return requires short static super switch synchronized this throw throws transient try var void volatile while Java String ...

docs.oracle.com › javase › tutorial › java › nutsandbolts › while.html

The while and do-while Statements (The Java™ Tutorials > Learning the Java Language > Language Basics)

Therefore, the statements within the do block are always executed at least once, as shown in the following DoWhileDemo program: class DoWhileDemo { public static void main(String[] args){ int count = 1; do { System.out.println("Count is: " + count); count++; } while (count < 11); } }

geeksforgeeks.org › java › loops-in-java

Java Loops - GeeksforGeeks

The do-while loop ensures that the code block executes at least once before checking the condition. Example: The below Java program demonstrates a do-while loop that prints numbers from 0 to 10 in a single line.

Published August 10, 2025

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sitepoint.com › blog › java › java’s while and do-while loops in five minutes

Java's While and Do-While Loops in Five Minutes — SitePoint

November 5, 2024 - The primary difference between a while loop and a do-while loop in Java lies in their execution. A while loop first checks the condition before executing the loop body. If the condition is false at the start, the loop body will not execute even once. On the other hand, a do-while loop executes the loop body first and then checks the condition.

digitalocean.com › community › tutorials › java-do-while-loop

Java do while loop | DigitalOcean

August 3, 2022 - Here is a simple java do-while loop example to print numbers from 5 to 10.

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do...while Loop in Java - Flowchart & Syntax (With Examples)

September 6, 2025 - The update expression in the do...while is the one that updates the variable of the loop. It may increment or decrement depending on the specifications. The update expression makes sure that at some point the test expression will evaluate to 'False' and the loop will terminate eventually. Consider this example below in Java Online Editor to identify both the expressions of the do...while loop.

devqa.io › java-do-and-do-while-statements

Java While and Do-While Loops with Code Examples

In this example, the loop asks the user to enter a number repeatedly until they input 0. Even if the user inputs 0 on the first try, the loop’s code block will still execute once before checking the condition.

forum.freecodecamp.org › guide

Java do..while loops explained with examples - Guide - The freeCodeCamp Forum

September 9, 2019 - An important thing to note is ... even if the conditon is not true). do { // Statements } while (condition); Example int iter_DoWhile = 20; do { System.out.print (iter_DoWhi......

teamtreehouse.com › community › do-while-loop-java-basic

do while loop - Java Basic (Example) | Treehouse Community

Hi Tanguy, I have seen this problem come up a lot. You do not actually need a boolean to run your do while loop, and you can simplify it a lot by having the loop depend on the response directly. java // I have initialized a java.io.Console for you. It is in a variable named console. String response; do{ response = console.readLine("Do you understand do while loops?"); }while(response.equalsIgnoreCase("no")); You may also include your print statement that you included using if(response.equalsIgnoreCase("no")). HOWEVER, with all that being said, what you did actually works fine! You just made a typo in your code. You wrote invalidReponse not invalidReSponse, as declared outside your loop. You can see these errors easily if you check the compiler error (You would see a symbol not found error point to that variable) Hope that helps!

I think i'm very unfamiliar with this kind of Java syntax. Using the console.printf() instead of System.out.println() and console.readLine() instead of scanner.nextLine(). I still don't understand why Tanguy Muffat's program works after fixing the syntax error. I don't understand how having the [while(response.equalsIgnoreCase("no"));] at the bottom works. Normally i would expect it to look more like : do{ while(response.equalsIgnoreCase("no")) { console.printf("Sorry you cannot continue the training. Train harder to understand the concept. \n"); }} I would think that a while condition with no brackets under it and nothing inside of it wouldn't work. In Tanguy Muffat's program it looks like the while loop is completely outside of the do loop.

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Do-While Loop in Java: Examples, Applications & Tips 2025

September 10, 2025 - The loop continues executing as long as i is less than or equal to the specified limit num. This example shows that do while syntax Java loops are well-suited for tasks requiring cumulative calculations that must run at least once.

geeksforgeeks.org › java › java-while-loop-with-examples

Java while Loop - GeeksforGeeks

Explanation: In the above example, the while loop runs until "i" is less than 6 and prints "Hello World" 5 times. Example: Calculating the Sum of Numbers from 1 to 10 with Java while Loop

Published 1 month ago

stackoverflow.com › questions › 71235205 › java-using-do-while-loop

Java Using do-while loop - Stack Overflow

That is not that difficult. You need to put the input of an Integer into the loop and check if it is the highest or lowest so far. The loop ends after 5 inputs and you can print the highest and the lowest.

datacamp.com › doc › java › java-while-loop

Java While Loop

This example demonstrates an infinite while loop, where the condition is always true. The break statement is used here to exit the loop, preventing it from running indefinitely. import java.util.Scanner; public class InputValidationExample { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int number; System.out.println("Enter a number between 1 and 10:"); number = scanner.nextInt(); while (number < 1 || number > 10) { System.out.println("Invalid input.

ionos.com › digital guide › websites › web development › java do-while loop

How to use the Java do-while loop - IONOS

January 3, 2025 - This condition is always expressed as a Boolean expression, meaning, within the program’s logic, it evaluates to either true or false. A common and useful example of such an expression is a counter variable, which allows you to determine ...

beginnersbook.com › 2015 › 03 › while-loop-in-java-with-examples

While loop in Java with examples

The initialization done with i=0 Then goto while loop and check the condition i<4(i=0) It is true goto the loop body execute the looping statement i.e., args[0] Then increment the i value by 1 After incrementing again check the while loop condition ……. …… Until the condition is false. It prints given o/p ….thats all ... i would like to print all the tables with while loop for example i want the output as : 1*1=1 1*2=2 ...