Module 2: Java Basics

📌 Topics Covered

• Variables & Data Types
• Type Casting
• Operators
• Comments

🔤 Variables & Data Types

Java is a statically typed language, which means every variable must have a declared type.

                    int age = 25;
                    double price = 19.99;
                    char grade = 'A';
                    boolean isJavaFun = true;
                    String name = "Alice";
                    

🔁 Type Casting

You can convert one type into another, either implicitly or explicitly.

                    // Implicit Casting
                    int x = 10;
                    double y = x;
                    
                    // Explicit Casting
                    double price = 9.99;
                    int rounded = (int) price;
                    

➕ Operators

Java supports arithmetic, relational, logical, and assignment operators.

                    int a = 10, b = 5;
                    System.out.println(a + b);  // 15
                    System.out.println(a > b);  // true
                    System.out.println(a == b); // false
                    System.out.println(a != b && b < 10); // true
                    

💬 Comments

Use comments to document your code.

                    // This is a single-line comment
                    
                    /*
                      This is a 
                      multi-line comment
                    */