Codeblah: Your New Go-To Online Hub Where Programming Meets Passion

Welcome to Codeblah, your ultimate destination for diving into the world of programming. Whether you’re a beginner eager to learn your first programming language or an experienced developer looking to expand your knowledge, Codeblah is here to guide you every step of the way. From C and C++ to Java, PHP, .Net, Data Structures, and beyond, we’ve got you covered.

Learn Programming with Codeblah

Programming is an essential skill in today’s tech-driven world. At Codeblah, we believe that learning programming should be both fun and accessible. Our resources are designed to cater to all levels of expertise, ensuring that everyone, from novices to seasoned professionals, can benefit from our content.

How to Pick Your First Programming Language

Choosing your first programming language can be overwhelming. Here’s a simple guide to help you make an informed decision:

  1. Consider Your Goals: Are you interested in web development, mobile apps, game development, or data science? Different languages serve different purposes.
  2. Ease of Learning: Languages like Python and JavaScript are known for their beginner-friendly syntax.
  3. Community and Resources: A strong community can provide support and resources. Python, JavaScript, and Java have vast communities.
  4. Job Market: Consider the demand for the language in the job market. Java, Python, and C++ are highly sought after.

By evaluating these factors, you can choose a language that aligns with your interests and career goals.

Make Biodata Using C++ Program

Creating a biodata using C++ is a great way to practice your programming skills. Here’s a simple example:

#include <iostream>
using namespace std;

int main() {
    string name, address;
    int age;

    cout << "Enter your name: ";
    getline(cin, name);

    cout << "Enter your age: ";
    cin >> age;
    cin.ignore(); // to clear the buffer

    cout << "Enter your address: ";
    getline(cin, address);

    cout << "\n--- Biodata ---\n";
    cout << "Name: " << name << "\n";
    cout << "Age: " << age << "\n";
    cout << "Address: " << address << "\n";

    return 0;

This program prompts the user for their name, age, and address, and then prints the biodata.

Airline Reservation System in Java

Creating an airline reservation system is an excellent way to understand Java’s capabilities. Below is a simplified version of such a system:

import java.util.Scanner;

class Reservation {
    private String passengerName;
    private int flightNumber;

    public void bookFlight() {
        Scanner scanner = new Scanner(;

        System.out.print("Enter passenger name: ");
        passengerName = scanner.nextLine();

        System.out.print("Enter flight number: ");
        flightNumber = scanner.nextInt();

        System.out.println("Flight booked successfully for " + passengerName + " on flight number " + flightNumber);

public class AirlineReservation {
    public static void main(String[] args) {
        Reservation reservation = new Reservation();

This program allows the user to book a flight by entering their name and flight number.

W3Schools Offline Version Download

W3Schools is a fantastic resource for learning web development. Having an offline version can be incredibly useful. Here’s how you can download it:

  1. Visit the W3Schools website: Go to W3Schools.
  2. Look for the download option: Sometimes, they provide an offline version for download.
  3. Use third-party tools: If an official download isn’t available, you can use tools like HTTrack to create an offline version of the site.

Remember to respect their terms of use and copyright policies.

Employee Class in Java

Creating an employee class in Java can help you understand object-oriented programming concepts. Here’s an example:

class Employee {
    private String name;
    private int id;
    private double salary;

    public Employee(String name, int id, double salary) { = name; = id;
        this.salary = salary;

    public void displayDetails() {
        System.out.println("Employee ID: " + id);
        System.out.println("Employee Name: " + name);
        System.out.println("Employee Salary: $" + salary);

public class EmployeeTest {
    public static void main(String[] args) {
        Employee emp1 = new Employee("John Doe", 101, 50000);

This program defines an Employee class with attributes and a method to display the employee’s details.

C Program for Reverse a Number Using While Loop

Reversing a number is a common programming exercise. Here’s how you can do it in C using a while loop:

#include <stdio.h>

int main() {
    int num, reversedNum = 0, remainder;

    printf("Enter an integer: ");
    scanf("%d", &num);

    while (num != 0) {
        remainder = num % 10;
        reversedNum = reversedNum * 10 + remainder;
        num /= 10;

    printf("Reversed Number: %d\n", reversedNum);
    return 0;

This program takes an integer input from the user and reverses the number using a while loop.

Python Program Examples

Python is a versatile language that’s great for beginners. Here are a few simple programs to get you started:

  • Hello World:
print("Hello, World!")
  • Basic Calculator:
def add(x, y):
    return x + y

def subtract(x, y):
    return x - y

def multiply(x, y):
    return x * y

def divide(x, y):
    if y != 0:
        return x / y
        return "Division by zero is not allowed."

print("Select operation:")
print("1. Add")
print("2. Subtract")
print("3. Multiply")
print("4. Divide")

choice = input("Enter choice (1/2/3/4): ")

num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

if choice == '1':
    print(f"{num1} + {num2} = {add(num1, num2)}")
elif choice == '2':
    print(f"{num1} - {num2} = {subtract(num1, num2)}")
elif choice == '3':
    print(f"{num1} * {num2} = {multiply(num1, num2)}")
elif choice == '4':
    print(f"{num1} / {num2} = {divide(num1, num2)}")
    print("Invalid input")

Kotlin Program Examples

Kotlin is an excellent language for Android development. Here are a couple of basic programs:

  • Hello World:
fun main() {
    println("Hello, World!")
  • Simple Calculator:
fun main() {
    println("Select operation:")
    println("1. Add")
    println("2. Subtract")
    println("3. Multiply")
    println("4. Divide")

    val choice = readLine()!!.toInt()
    println("Enter first number: ")
    val num1 = readLine()!!.toDouble()
    println("Enter second number: ")
    val num2 = readLine()!!.toDouble()

    when (choice) {
        1 -> println("$num1 + $num2 = ${num1 + num2}")
        2 -> println("$num1 - $num2 = ${num1 - num2}")
        3 -> println("$num1 * $num2 = ${num1 * num2}")
        4 -> println(if (num2 != 0.0) "$num1 / $num2 = ${num1 / num2}" else "Division by zero is not allowed.")
        else -> println("Invalid input")


At Codeblah, we’re passionate about helping you learn and master programming. From picking your first programming language to advanced topics like creating an airline reservation system in Java or reversing a number in C, we provide comprehensive resources to support your learning journey. Dive into our tutorials, practice with our examples, and join our community of like-minded learners. Happy coding!

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