source code java

import java.util.Scanner; // Importing Scanner class for user input

public class Example {

    public static void main(String[] args) {
        // Basics of Java and input/output
        System.out.println("Hello, welcome to the Java example!");

        // Relational operators and if...else statements
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter your age: ");
        int age = scanner.nextInt();

        if (age >= 18) {
            System.out.println("You are an adult.");
        } else {
            System.out.println("You are a minor.");
        }

        // Logical operators and compound statements
        boolean isStudent = true;
        if (age >= 18 && isStudent) {
            System.out.println("You are an adult student.");
        }

        // Switch statement
        System.out.print("Enter a day (1-7): ");
        int day = scanner.nextInt();

        switch (day) {
            case 1:
                System.out.println("Sunday");
                break;
            case 2:
                System.out.println("Monday");
                break;
            // ... cases for other days ...
            default:
                System.out.println("Invalid day");
        }

        // For loop and array
        int[] numbers = {1, 2, 3, 4, 5};
        System.out.println("Printing array elements using a for loop:");
        for (int i = 0; i < numbers.length; i++) {
            System.out.print(numbers[i] + " ");
        }
        System.out.println(); // Move to the next line

        // While loop
        System.out.println("Printing array elements using a while loop:");
        int index = 0;
        while (index < numbers.length) {
            System.out.print(numbers[index] + " ");
            index++;
        }
        System.out.println(); // Move to the next line

        // Creating a method
        int result = addNumbers(10, 20);
        System.out.println("Result of adding two numbers: " + result);

        // Calling a method and passing parameters by value
        int a = 5;
        int b = 7;
        swapValues(a, b);
        System.out.println("Values after swap - a: " + a + ", b: " + b);

        // File input/output (not covered in this basic example)
    }

    // Method to add two numbers
    private static int addNumbers(int x, int y) {
        return x + y;
    }

    // Method to swap values (not actually swapping due to Java's pass by value)
    private static void swapValues(int m, int n) {
        int temp = m;
        m = n;
        n = temp;
    }
}