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Hey everyone! πŸš€ Welcome to Codeblah - your new go-to online hub where programming meets passion. Dive into the world of C, C++, Java, PHP, .Net, Data Structure, and so much more. Whether you're a coder, a designer, or just curious about programming, we've got something for everyone. Let's learn, share, and grow together in this amazing community. Start your coding journey with us today!

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Airline Reservation System in Java

Develop a program for a small airline's new automated reservation system, designed to manage bookings for its sole aircraft, which has a total capacity of 10 seats. The system should offer options for passengers to choose between First Class (seats 1–5) and Economy (seats 6–10).

When launched, the application prompts users with: "Please type 1 for First Class" or "Please type 2 for Economy". Based on the user's selection:

If the user chooses 1, assign them a seat in First Class.
If the user chooses 2, assign them a seat in Economy.
After assigning a seat, the program should generate a boarding pass showing the seat number and whether it's in First Class or Economy.

Implement a one-dimensional boolean array to represent the plane's seating arrangement, with all elements initially set to false, indicating all seats are available. As seats are booked, their corresponding array elements should be updated to true, marking them as occupied.

Ensure no seat is double-booked. If the chosen section is full, the program should inquire if the passenger is willing to be seated in the alternative section. If they agree, proceed with the assignment; if not, inform them that the next flight is in 3 hours.
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Create a SavingsAccount class incorporating a static variable annualInterestRate to hold the yearly interest rate for everyone with an account. Each SavingsAccount instance should have a private variable savingsBalance showing the current deposit amount. Include a method calculateMonthlyInterest to figure out the monthly interest by multiplying savingsBalance with annualInterestRate and then dividing by 12. This calculated interest must be added back to savingsBalance. Also, add a static method modifyInterestRate to adjust the annualInterestRate to a new value.

To demonstrate how the SavingsAccount class works, create a test program. In it, initialize two SavingsAccount instances: saver1 with a balance of $2000.00 and saver2 with $3000.00. Set the annualInterestRate to 4%, compute the monthly interest for a full year, and display the updated balances for both accounts. Afterward, change the annualInterestRate to 5%, calculate and show the interest for the following month, and present the updated balances for both saver1 and saver2.

//public class SavingsAccount {
private static double annualInterestRate = 0.0; // Annual interest rate for all account holders
private double savingsBalance; // Current balance in the savings account

// Constructor to initialize savings balance
public SavingsAccount(double savingsBalance) {
this.savingsBalance = savingsBalance;

// Method to set the savings balance
public void setSavingsBalance(double savingsBalance) {
this.savingsBalance = savingsBalance;

// Static method to modify the annual interest rate
public static void modifyInterestRate(double newInterestRate) {
if (newInterestRate >= 0.0) {
annualInterestRate = newInterestRate;
} else {
throw new IllegalArgumentException("Interest rate must be >= 0.0");

// Method to get the current savings balance
public double getSavingsBalance() {
return this.savingsBalance;

// Static method to get the annual interest rate
public static double getAnnualInterestRate() {
return annualInterestRate;

// Method to calculate and update the monthly interest
public void calculateMonthlyInterest() {
double monthlyInterest = (this.savingsBalance * annualInterestRate) / 12;
this.savingsBalance += monthlyInterest;

// Method to return the savings balance as a formatted string
public String toString() {
return String.format("$%.2f", getSavingsBalance());
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Get the Offline Version of W3Schools for Free:
W3Schools is a top educational platform offering tutorials on web development, including HTML, CSS, JavaScript, PHP, ASP.Net, SQL, and more. It's the go-to online resource for over 35 million visitors monthly, making it the most popular website for learning web development.

W3Schools Offline Access
These tutorials are perfect for beginners eager to learn web development, offering thousands of examples with the option to edit and run them live.

However, the main limitation of W3Schools is its requirement for an internet connection to access its vast resources. But don't worry, I've discovered a fantastic solution to this issue. In this article, I'll share how you can download the offline version of W3Schools for free.

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C# - The Powerhouse of Versatility

C# is a language that seamlessly blends sophistication with user-friendliness, making it a go-to for developers working on anything from desktop applications to game development with Unity. Its evolution with .NET Core has opened new doors to cross-platform development, allowing applications built in C# to run on Linux and macOS with minimal modifications. The language's strong typing, along with its comprehensive set of features like LINQ (Language Integrated Query) and async/await for asynchronous programming, makes it both powerful and efficient for developers. C# is not just a language; it's a gateway to creating high-performance, scalable applications, whether it's for enterprise software, mobile apps, or immersive game experiences. Its community is robust, offering extensive resources and support for developers at every step of their journey.
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JavaScript - The Language of the Web

JavaScript has transcended its origins as a simple scripting language for web browsers to become the cornerstone of modern web development. With the advent of Node.js, JavaScript broke free from the confines of the client side, enabling full-stack development with a single language. Frameworks like React, Angular, and Vue have revolutionized how we build interactive and dynamic web applications, offering unparalleled user experiences. The rise of serverless architectures and IoT applications has further expanded JavaScript's domain, proving its versatility. JavaScript's ecosystem is vibrant, constantly evolving with tools and libraries that push the boundaries of what's possible on the web. It embodies the spirit of innovation, making web development more accessible and powerful.
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The Swiss Army Knife of Programming

Python's elegance and simplicity have made it a favorite among beginners and experts alike. It's the versatility personified - from web development with Django and Flask to its pivotal role in the explosion of data science and machine learning with libraries like TensorFlow and PyTorch. Python's syntax is clean and intuitive, making it an ideal language for prototyping and complex application development. Its community is a treasure trove of resources, fostering an environment where learning and collaboration flourish. With Python, the possibilities are limitless, whether you're automating mundane tasks, crunching massive datasets, or developing the next big AI application. It's a language that grows with you, constantly adapting to the technological landscape's shifts.
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PHP - The Web's Backbone
PHP, often seen as the scripting language that powers the web, continues to evolve, blending tradition with modern web development needs. It's not just about creating dynamic web pages anymore; PHP 8 introduces features like Just-In-Time compilation, attributes, and union types that push the envelope of efficiency and readability. The language's robust ecosystem, including frameworks like Laravel and Symfony, makes web development not just accessible but truly enjoyable. Imagine crafting a blog, e-commerce site, or even a social network with PHP as your foundation. Its continuous improvement reflects a commitment to meeting the demands of developers and the internet's evolving landscape. PHP's story is one of resilience and innovation, proving it's far from being outdated but rather essential in crafting the future of web experiences.
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Jumping into Java? πŸš€πŸ’» Here's a quick and simple tutorial to get you started with one of the most versatile programming languages out there!

Hello World in Java:
Java is all about classes and objects, and the best way to dive in is by creating your very first program - the classic "Hello, World!"

1. Set Up Your Environment: Make sure you have Java installed on your computer. You'll also need an IDE (Integrated Development Environment) like Eclipse or IntelliJ, or just a simple text editor.

2. Write Your Code:
Create a new file named HelloWorld.java, and type in the following code:

public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World!");

This code defines a class named HelloWorld with a main method. System.out.println is used to print a line of text to the console.

Compile and Run:
1. To compile your program, open your command line or terminal, navigate to the directory containing your file, and type javac HelloWorld.java.

2. To run your program, type java HelloWorld in the terminal. You should see Hello, World! printed out.
Congratulations! You've just written and executed your first Java program. πŸŽ‰

Java is a powerful tool for building everything from mobile apps to large enterprise systems. Keep experimenting, learning, and building. Your journey into coding has just begun. Let's code something amazing together!

#JavaTutorial #CodingBeginners #HelloWorld
Java Tutorial for Beginners - YouTube

Java tutorial for beginners - Learn Java, the language behind millions of apps and websites. πŸ”₯ Want to master Java? Get my complete Java mastery bundle: htt...

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I tried 50 Programming Courses. Here are Top 5. - YouTube

1. How to learn coding efficiently2. How to become better at Programming?3. How to become a Software Engineer?I will answer these questions in this video.β–Ί F...

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Just dove deep into the world of algorithms with a C program to implement Strassen's Algorithm for matrix multiplication! πŸš€πŸ–₯️ This technique is a game-changer, significantly reducing the complexity and time it takes to multiply large matrices.

Strassen's Algorithm is not just about multiplying numbers; it's about optimizing the process, making calculations faster and more efficient. By dividing matrices into smaller parts and recombining them with fewer operations, this algorithm shows the power of innovative thinking in coding.

For those who love to challenge themselves and push the boundaries of what's possible with programming, diving into Strassen's Algorithm is a thrilling journey. It's a perfect example of how a creative approach can lead to significant improvements in performance. πŸ’‘βœ¨

Embarking on this project has been an incredible learning experience, highlighting the importance of algorithms in computing and the endless possibilities that come with mastering them. If you're intrigued by optimizing code and making your programs run faster, exploring Strassen's Algorithm is a fantastic place to start. Let's keep innovating and coding our way to more efficient solutions!

#CodingChallenge #StrassensAlgorithm #CProgramming
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Just shared a super simple Java snippet for doing basic calculations, and it's perfect for anyone getting started with coding! πŸš€πŸ‘©β€πŸ’» Whether you're calculating daily expenses, budgeting for your next trip, or just playing around with numbers, Java makes it easy and efficient.

Here's a sneak peek at how straightforward it can be:

//public class SimpleCalculation {
public static void main(String[] args) {
int a = 10;
int b = 5;

System.out.println("Addition: " + (a + b));
System.out.println("Subtraction: " + (a - b));
System.out.println("Multiplication: " + (a * b));
System.out.println("Division: " + (a / b));

This little program covers the basicsβ€”addition, subtraction, multiplication, and division. Perfect for those just starting their coding journey or anyone looking to brush up on their Java skills. πŸ“šπŸ’» Dive into Java with simple projects like this, and you'll be amazed at how quickly you can pick up new skills and concepts. Let's code, learn, and grow together!
#JavaBasics #CodingFun #LearnToCode
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Stepping into the world of coding but not sure where to start? πŸ€”πŸ’» Picking your first programming language can feel like a big decision, but it's all about finding the right fit for you! Here's a little guidance:

1. Think about your goals - Want to build websites? JavaScript might be your go-to. Interested in app development? Consider Swift for iOS or Kotlin for Android. If data science excites you, Python is a fantastic start.

2. Ease of learning - Some languages are more beginner-friendly than others. Python, for example, is known for its readability and simplicity.

3. Community and resources - A strong community and plenty of learning resources can make your coding journey smoother. Languages like Python, JavaScript, and Java have vast communities.

4. Job opportunities - Look into the demand in the job market. Languages like JavaScript, Python, and Java continue to be in high demand.

Remember, there's no one "best" language to start with – it's about where you see yourself going. Dive in, start experimenting, and enjoy the process of learning. Your coding adventure is just beginning! πŸš€βœ¨

#CodingJourney #FirstProgrammingLanguage #LearnToCode
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Just had a blast creating a Python program that rotates a given string, and I'm excited to share it with you! πŸŽ‰πŸ’» Check out this snippet that adds a fun twist to text manipulation:

//# Function to rotate a string
//def rotate_string(s, n):
// return s[n:] + s[:n]

//# Example usage
//original_string = "Hello, World!"
//rotation_amount = 5
//rotated_string = rotate_string(original_string, rotation_amount)

//print(f"Original: {original_string}")
//print(f"Rotated: {rotated_string}")

This piece of code lets you take any string and rotate it by a certain number of characters, bringing the end of the string to the front. πŸ”„βœ¨ Whether you're coding a puzzle, creating unique text effects, or just experimenting with Python, this function adds a creative spin. Dive into the fun of coding and see how you can transform simple ideas into something awesome. Let's keep rotating and coding!
#PythonFun #StringManipulation #CreativeCoding
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Just wrote a cool little Python snippet that converts kilometers to miles, and I had to share it with you all! πŸš€πŸ’» Here's a peek at how simple and powerful Python can be:

//# Convert kilometers to miles
//kilometers = float(input("Enter distance in kilometers: "))
//miles = kilometers * 0.621371
//print(f"{kilometers} kilometers is equal to {miles} miles.")

Whether you're mapping out your next road trip or just nerding out over coding like us, this handy tool is a fun way to see Python in action. πŸ›£οΈβœ¨ Dive into coding with us and discover how even a few lines of code can open up a world of possibilities. Let's turn those kilometers into miles together!
#PythonMagic #CodeSnippet #TechFun