public class PrintingPractice {
    public static void main(String[] args) {
        System.out.println("\"Hello, World! My name is Java.\"");
    }
}

public class NameAndAgePrinter {
    public static void main(String[] args) {
        System.out.println("YourName");
        System.out.println("YourAge");
    }
}

public, class, static, void, int, double, boolean, String, ...

int age; // Declaring a variable
age = 25; // Assigning a value to the variable

int age = 25; // Declaring and assigning simultaneously

class HelloCoder {
    public static void main(String[] args) {
        System.out.print("How to Print in Java! ");
        System.out.print("Continued from the previous message:\n\nThis is the continuation of the previous example:\n\nHello, World!");
    }
}

How to Print in Java! Continued from the previous message:
This is the continuation of the previous example:
Hello, World!

class HelloCoder {
    public static void main(String[] args) {
        System.out.println("Hello,");
        System.out.println("World!");
    }
}

Hello,
World!

class HelloCoder {
    public static void main(String[] args) {
        String name = "John";
        int age = 25;
        double height = 1.75;

        System.out.printf("Name: %s, Age: %d, Height: %.2f", name, age, height);
    }
}

Name: John, Age: 25, Height: 1.75

class HelloCoder {
    public static void main(String[] args) {
        int age = 25;
        double height = 1.75;
        char gender = 'M';
        boolean isStudent = true;
        String name = "John Doe";

        System.out.println("Name: " + name);
        System.out.println("Age: " + age);
        System.out.println("Height: " + height);
        System.out.println("Gender: " + gender);
        System.out.println("Is Student: " + isStudent);
    }
}

Name: John Doe
Age: 25
Height: 1.75
Gender: M
Is Student: true

class HelloCoder {
    public static void main(String[] args) {
        String firstName = "John";
        String lastName = "Doe";
        String fullName = firstName + " " + lastName;

        System.out.println("Full Name: " + fullName);
    }
}

Full Name: John Doe

Practice Question:

Variable Declaration and Initialization:

a) Write a Java program to declare and initialize an integer variable with the value 10. Print the value of the variable.

b) Write a Java program to declare and initialize a double variable with the value 3.14.

Feel free to attempt these questions and share your solutions in the group to practice variable declaration and initialization in Java!

public class Main {
    public static void main(String[] args) {
        int number = 10;
        System.out.println("The value of the variable is: " + number);
    }
}

public class Main {
    public static void main(String[] args) {
        double pi = 3.14;
        System.out.println("The value of the variable is: " + pi);
    }
}

   import java.util.Scanner;
   

   Scanner scanner = new Scanner(System.in);
   

   import java.util.Scanner;

   public class UserInputExample {
       public static void main(String[] args) {
           Scanner scanner = new Scanner(System.in);

           System.out.print("Enter your name: ");
           String name = scanner.nextLine();

           System.out.println("Hello, " + name + "!");
       }
   }
   

Student Information:
Name: John Doe
Age: 18
Favorite Subject: Mathematics

import java.util.Scanner;

public class StudentInformationDisplay {
    public static void main(String[] args) {
        // Declare variables
        String name;
        int age;
        String favoriteSubject;

        // Create a Scanner object to read input
        Scanner scanner = new Scanner(System.in);

        // Prompt the user to enter student information
        System.out.print("Enter student's name: ");
        name = scanner.nextLine();

        System.out.print("Enter student's age: ");
        age = Integer.parseInt(scanner.nextLine());

        System.out.print("Enter student's favorite subject: ");
        favoriteSubject = scanner.nextLine();

        // Close the scanner
        scanner.close();

        // Display the student information
        System.out.println("Student Information:");
        System.out.println("Name: " + name);
        System.out.println("Age: " + age);
        System.out.println("Favorite Subject: " + favoriteSubject);
    }
}

   Example:
   int a = 10;
   int b = 3;

   int sum = a + b;
   int difference = a - b;
   int product = a * b;
   int quotient = a / b;
   int remainder = a % b;

   System.out.println("a + b = " + sum);
   System.out.println("a - b = " + difference);
   System.out.println("a * b = " + product);
   System.out.println("a / b = " + quotient);
   System.out.println("a % b = " + remainder);

   // Increment and decrement
   int c = 5;
   System.out.println("Initial value of c: " + c);
   c++; // Increment c by 1
   System.out.println("After incrementing: " + c);
   c--; // Decrement c by 1
   System.out.println("After decrementing: " + c);
   

   Example:
   int a = 5;
   int b = 10;

   System.out.println(a + " == " + b + " is " + (a == b));
   System.out.println(a + " != " + b + " is " + (a != b));
   System.out.println(a + " > " + b + " is " + (a > b));
   System.out.println(a + " < " + b + " is " + (a < b));
   System.out.println(a + " >= " + b + " is " + (a >= b));
   System.out.println(a + " <= " + b + " is " + (a <= b));