1. Hello World: public class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } } Output: Hello, World! 2. Variables and Data Types: public class VariablesExample { public static void main(String[] args) { // Integer variable int age = 25; // Floating-point variable double height = 5.8; // Character variable char gender = 'M'; // Boolean variable boolean isStudent = true; System.out.println("Age: " + age); System.out.println("Height: " + height); System.out.println("Gender: " + gender); System.out.println("Is a student? " + isStudent); } } 3. Conditional Statements: public class ConditionalExample { public static void main(String[] args) { int number = 10; if (number > 0) { System.out.println("Number is positive"); } else if (number < 0) { System.out.println("Number is negative"); } else { System.out.println("Number is zero"); } } } 4. Loops: public class LoopExample { public static void main(String[] args) { // For loop for (int i = 1; i <= 5; i++) { System.out.println("Count: " + i); } // While loop int j = 1; while (j <= 5) { System.out.println("Count: " + j); j++; } // Do-while loop int k = 1; do { System.out.println("Count: " + k); k++; } while (k <= 5); } } 5. ARRAY: public class ArrayExample { public static void main(String[] args) { // Array declaration and initialization int[] numbers = {1, 2, 3, 4, 5}; // Accessing elements of an array System.out.println("First element: " + numbers[0]); System.out.println("Second element: " + numbers[1]); // Modifying elements of an array numbers[2] = 10; // Iterating over an array for (int i = 0; i < numbers.length; i++) { System.out.println("Element at index " + i + ": " + numbers[i]); } } } C++ 1. Hello World #include int main() { std::cout << "Hello, World!" << std::endl; return 0; } 2. Variables and Data Types: #include int main() { // Integer variable int age = 25; // Floating-point variable double height = 5.8; // Character variable char gender = 'M'; // Boolean variable bool isStudent = true; std::cout << "Age: " << age << std::endl; std::cout << "Height: " << height << std::endl; std::cout << "Gender: " << gender << std::endl; std::cout << "Is a student? " << isStudent << std::endl; return 0; } 3. Conditional Statements: #include int main() { int number = 10; if (number > 0) { std::cout << "Number is positive" << std::endl; } else if (number < 0) { std::cout << "Number is negative" << std::endl; } else { std::cout << "Number is zero" << std::endl; } return 0; } 4. Loops: #include int main() { // For loop for (int i = 1; i <= 5; i++) { std::cout << "Count: " << i << std::endl; } // While loop int j = 1; while (j <= 5) { std::cout << "Count: " << j << std::endl; j++; } // Do-while loop int k = 1; do { std::cout << "Count: " << k << std::endl; k++; } while (k <= 5); return 0; } 5. ARRAY: #include int main() { // Array declaration and initialization int numbers[] = {1, 2, 3, 4, 5}; // Accessing elements of an array std::cout << "First element: " << numbers[0] << std::endl; std::cout << "Second element: " << numbers[1] << std::endl; // Modifying elements of an array numbers[2] = 10; // Iterating over an array for (int i = 0; i < sizeof(numbers) / sizeof(numbers[0]); i++) { std::cout << "Element at index " << i << ": " << numbers[i] << std::endl; } return 0; }