Tutorjoes
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Java : Looping Statement - Exercises and Solution
Write Java program to Print string in hexadecimal format View Solution · 60. Write Java program to Find the (GCD) Greatest Common Divisor View Solution · 61. Write Java program to Find the (LCM) Lowest Common Multiple View Solution · 62. Write Java program to Extract words from a given sentence View Solution · 63. Write Java program to Print Fibonacci Series View Solution · 64. Write Java program to Find Factorial of a Number View Solution · 65. Write Java program to Generate Random Numbers from 0 to given Range View Solution
BeginwithJava
beginwithjava.com › home › coding › programming questions and exercises : loops
Programming Questions and Exercises : Loops - BeginwithJava
October 7, 2024 - Write a program to find the factorial value of any number entered through the keyboard. Show the answer. import java.util.Scanner; public class FactorialDemo1 { public static void main(String[] args) { Scanner console = new Scanner(System.in); int num; // To hold number int fact = 1; // To hold factorial System.out.print("Enter any positive integer: "); num = console.nextInt(); for(int i=1; i<=num; i++) { fact *= i; } System.out.println("Factorial: "+ fact); } }
Best Practice in `For` loop in java - Stack Overflow
Second one is better approach because ... in a loop that is a extra burden to JVM. ... Best practice suggests writing the most readable code first, rather than micro-optimizing... 2012-05-11T08:27:06.24Z+00:00 ... Thanks @JonSkeet. But in many places it is often misread or misunderstood.I also thought that best practices means, writing code that will be too lite for JVM to execute. 2012-05-11T08:49:23.9Z+00:00 ... Im not so sure but i think the optimizer of java will replace ... More on stackoverflow.com
What makes for-loops difficult for beginners?
The syntax of for loops in C-like languages is not exactly intuitive. Even the name "for" seems like a rather non-descriptive, meaningless word. I don't know how for loops are commonly taught, but perhaps it is common to see them introduced with examples like this: for (int i = 0; i < 10; ++i) print i; Now, it is true that the most common use of for loops is to repeat something a certain number of times like this, but if this is how for loops are introduced, then I can understand how they seem mysterious. What in the world is all that garbage syntax doing there for a simple counting loop? Why are there all of those semicolons, and why do you have to say ++i? Etc. It would be better, I think, to teach that the loop for (initialization; condition; update) statement; is (almost) equivalent to initialization; while (condition) { statement; update; } and then show several examples of the same code written in both of these ways to demonstrate and reinforce this equivalence. These examples should include not only the common case of repeating a statement a certain number of times, but also other uses of the for loop, such as finding the length of a C string (where the condition is like *p != '\0'). More on reddit.com
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March 29, 2013for loop in Python and for loop in Java: differences
python only has for each loops More on reddit.com
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November 8, 2022Can someone explain for loops like I'm 5?
Try writing it all out on paper, erasing and updating each variable. The inner loop is going to be repeated on each iteration of the outer loop. More on reddit.com
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September 6, 2011Videos
05:55
Loops in Java (Exercise 2) - YouTube
07:08
Loops in Java (Exercise 12) - YouTube
06:05
Loops in Java (Exercise 1) - YouTube
25:49
Java tutorial: Practice Questions on Loops - YouTube
Loops in Java (Exercise 1)
Loops in Java (Exercise 12)
Programiz
programiz.com › java-programming › for-loop
Java for Loop (With Examples)
If the condition is true, the body of the for loop is executed. The updateExpression updates the value of initialExpression. The condition is evaluated again. The process continues until the condition is false. To learn more about the conditions, visit Java relational and logical operators. ... // Program to print a text 5 times class Main { public static void main(String[] args) { int n = 5; // for loop for (int i = 1; i <= n; ++i) { System.out.println("Java is fun"); } } }
Medium
medium.com › @cortizftw › java-exercises-loops-e9a2214b6dd2
Java Exercises — Loops
September 28, 2023 - Write a for loop that iterates through each number between 1 and 6, and uses a modulus operator along with an if statement to state whether each value is even or odd. Sample Output 1 is odd 2 is even 3 is odd 4 is even 5 is odd 6 is even · ...
AvanTutor Blog
avantutor.com › home › 10 simple java for-loop exercises
10 Simple Java For-Loop Exercises - AvanTutor Blog - Tips, Tricks, and Resources for Mastering Coding
January 28, 2020 - Try any of these basic for-loop exercises to test your Java for-loop skills. Exercises come with their own editor and compiler right here on the page!
GeeksforGeeks
geeksforgeeks.org › java › loops-in-java
Java Loops - GeeksforGeeks
Normally the statements contain an update value for the variable being processed for the next iteration. When the condition becomes false, the loop terminates which marks the end of its life cycle. 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
Simply Coding
simplycoding.in › java-for-and-while-loops
Java for and while loops questions for practice - Simply Coding
June 19, 2021 - ... int datacount = 1; while(datacount ... } ... Give the output and show the dry run. public static void abc() { int x=1, i=2; do { x*=i; }while(++i<=5); System.out.println(x); } ... The following program is supposed to check the ...
W3Schools
w3schools.com › java › java_for_loop.asp
Java For Loop
Java Examples Java Videos Java ... you know exactly how many times you want to loop through a block of code, use the for loop instead of a while loop:...
GroTechMinds
grotechminds.com › home › java loop programs examples
java loop programs examples
October 17, 2024 - Learn Java loop programming with practical examples. Understand the use of for, while, and do-while loops in Java.
CodingBat
codingbat.com › doc › java-for-while-loops.html
CodingBat Java For While Loops
This handout introduces the basic structure and use of Java for and while loops with example code an exercises. See also the associated CodingBat java loop practice problems using strings and arrays.
CodeChef
codechef.com › blogs › loops-in-java
Loops in Java - For, While, Nested Loops
August 7, 2024 - Learn how to use Java loops effectively. This guide covers for loops, while loops, nested loops, and practical coding examples for beginners.
HackerRank
hackerrank.com › challenges › java-loops-i › problem
Java Loops I | HackerRank
We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies. ... Objective In this challenge, we're going to use loops to help us do some simple math.
GeeksforGeeks
geeksforgeeks.org › java › java-for-loop-with-examples
Java For Loop - GeeksforGeeks
1 week ago - The following examples demonstrate how for loops and nested for loops are used in Java for iteration, pattern printing, and calculations.
W3Schools
w3schools.com › java › exercise.asp
Exercise: - JAVA For Loops
I completed one of the JAVA exercises on w3schools.com
Learn Java
javatutoring.com › java-for-loop
Java For Loop - Tutorial With Examples | Loops - Learn Java
November 28, 2025 - In the above example, the outer loop travels through an array of references (where each reference will refer an array) and the inner loop travels through each element (of the current array). ... © 2025. Copyrighted Protected. Duplication or Copying Our Site Content Is Strictly Prohibited. However, Reference Links Are Allowed To Our Original Articles - JT. ... Java program & tutorial to read all elements in a vector by using iterator.
Learn Java
learnjavaonline.org › en › Loops
Loops - Learn Java - Free Interactive Java Tutorial
Here is the order of the commands: int i = 0; i < 3 // 0 < 3 = true // Inside of loop i++ // i is now 1 i < 3 // 1 < 3 = true // Inside of loop i++ // i is now 2 i < 3 // 2 < 3 = true // Inside of loop i++ // i is now 3 i < 3 // 3 < 3 = false // Loop is done...
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Personally I'd use the enhanced for statement instead:
for (Object element : e) {
// Use element
}
Unless you need the index, of course.
If I had to use one of the two forms, I'd use the first as it's tidier (it doesn't introduce another local variable which is only used in that loop), until I had concrete evidence that it was causing a problem. (In most list implementations, e.size() is a simple variable access which can be inlined by the JIT anyway.)
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Usually, the most brief and readable code is the best choice, all things being equal. In the case of Java, the enhanced for loop (which works with any class that implements Iterable) is the way to go.
for (Object object : someCollection) { // do something }
In terms solely of the two you posted, I think the first is the better option. It's more readable, and you have to remember that, under the hood, JIT will attempt to optimize a great deal of the code you write anyway.
EDIT: Have you heard the phrase "premature optimisation is the root of all evil"? Your second block is an example of premature optimisation.
NTU
www3.ntu.edu.sg › home › ehchua › programming › java › J2a_BasicsExercises.html
Java Basics Exercises - Java Programming Tutorial
What is the difference between "while-do" and "do-while" loops? Modify the program to sum from 111 to 8899, and compute the average. Introduce an int variable called count to count the numbers in the specified range (to be used in computing the average). int count = 0; // Count the number within the range, init to 0 for ( ...; ...; ...
w3resource
w3resource.com › java-exercises
Java programming Exercises, Practice, Solution - w3resource
This resource offers a total of 5356 Java Programming problems for practice.
Software Testing Help
softwaretestinghelp.com › home › java › java for loop tutorial with program examples
Java For Loop Tutorial With Program Examples
July 23, 2025 - In the below programming example, we have initialized an array of size = 5 with five different values and tried to iterate the array using a for-loop and a for-each loop. You can see that there is no difference in the way in which these elements are displayed by using both the loops. import java.util.*; public class example { public static void main(String[] args) { int arr[] = new int[5]; //Initializing the array with five values as size is 5 arr[0] = 140; arr[1] = 20; arr[2] = 260; arr[3] = 281; arr[4] = 53; //Printing the elements using for loop System.out.println("Using for-loop:"); for(int i=0; i < arr.length; i++) { System.out.println(arr[i]); } //Printing the elements using for-each loop System.out.println("Using for-each loop:"); for(int obj: arr){ System.out.println(obj); } } }