Module 7: Arrays & Strings

📚 Arrays

An array is a container object that holds a fixed number of values of a single type.

🔸 Declaring and Using Arrays

                    int[] numbers = new int[5];
                    numbers[0] = 10;
                    numbers[1] = 20;
                    System.out.println(numbers[0]);
                    

🔸 Array Initialization

                    int[] values = { 1, 2, 3, 4, 5 };
                    for (int i = 0; i < values.length; i++) {
                        System.out.println(values[i]);
                    }
                    

🔤 Strings

Strings in Java are objects that represent sequences of characters. They are immutable.

🔸 Declaring Strings

                    String name = "Java";
                    System.out.println(name);
                    

🔸 Common String Methods

                    String s = "Hello World";
                    System.out.println(s.length());        // 11
                    System.out.println(s.toUpperCase());   // HELLO WORLD
                    System.out.println(s.contains("World")); // true
                    

🔸 String Comparison

                    String a = "Java";
                    String b = "Java";
                    System.out.println(a.equals(b));  // true