☕ *Java Fundamentals – Must-Know Basics for Every Beginner* 1️⃣ *Java Syntax & Structure* • Java programs are written in *classes*. • Code starts from the `main()` method: ``` public class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } } ``` 2️⃣ *Data Types* • *Primitive:* int, float, double, char, boolean, byte, short, long • *Non-Primitive:* String, Arrays, Classes 3️⃣ *Variables & Operators* • Variable example: `int age = 25;` • Operators: +, -, *, /, %, ++, --, ==, !=, &&, || 4️⃣ *Control Statements* • *if-else:* ``` if (a > b) { System.out.println("A is greater"); } ``` • *switch-case:* ``` switch(day) { case 1: System.out.println("Mon"); break; } ``` • *Loops:* for, while, do-while 5️⃣ *Input & Output* • Input using Scanner: ``` Scanner sc = new Scanner(System.in); int x = sc.nextInt(); ``` • Output using `System.out.println()` 🟢 *Master these fundamentals to build a strong foundation in Java!* *React ❤️ for OOP concepts next!*