Example 1: Data Types and Variables

public class DataTypesExample {

    public static void main(String[] args) {

        // Declare and initialize variables

        int age = 20;

        double height = 5.8;

        char gender = 'M';

        boolean isStudent = true;


        // Display information using variables

        System.out.println("Age: " + age);

        System.out.println("Height: " + height);

        System.out.println("Gender: " + gender);

        System.out.println("Is a student? " + isStudent);

    }

}

Output:

Age: 20

Height: 5.8

Gender: M

Is a student? true


Example 2: Arithmetic Operators

public class ArithmeticOperatorsExample {

    public static void main(String[] args) {

        // Declare and initialize variables

        int num1 = 10;

        int num2 = 5;


        // Perform arithmetic operations

        int sum = num1 + num2;

        int difference = num1 - num2;

        int product = num1 * num2;

        int quotient = num1 / num2;


        // Display results

        System.out.println("Sum: " + sum);

        System.out.println("Difference: " + difference);

        System.out.println("Product: " + product);

        System.out.println("Quotient: " + quotient);

    }

}

Output:

Sum: 15

Difference: 5

Product: 50

Quotient: 2


Example 3: Relational Operators

public class RelationalOperatorsExample {

    public static void main(String[] args) {

        // Declare and initialize variables

        int num1 = 10;

        int num2 = 5;


        // Perform relational operations

        boolean isEqual = num1 == num2;

        boolean isNotEqual = num1 != num2;

        boolean isGreaterThan = num1 > num2;

        boolean isLessThan = num1 < num2;


        // Display results

        System.out.println("Is Equal: " + isEqual);

        System.out.println("Is Not Equal: " + isNotEqual);

        System.out.println("Is Greater Than: " + isGreaterThan);

        System.out.println("Is Less Than: " + isLessThan);

    }

}

Output:

Is Equal: false

Is Not Equal: true

Is Greater Than: true

Is Less Than: false


Example 4: Logical Operators

public class LogicalOperatorsExample {

    public static void main(String[] args) {

        // Declare and initialize variables

        boolean isJavaFun = true;

        boolean isLearning = false;


        // Perform logical operations

        boolean resultAnd = isJavaFun && isLearning;

        boolean resultOr = isJavaFun || isLearning;

        boolean resultNot = !isJavaFun;


        // Display results

        System.out.println("Result of AND: " + resultAnd);

        System.out.println("Result of OR: " + resultOr);

        System.out.println("Result of NOT: " + resultNot);

    }

}

Output:

Result of AND: false

Result of OR: true

Result of NOT: false


Example 5: Increment and Decrement Operators

public class IncrementDecrementOperatorsExample {

    public static void main(String[] args) {

        // Declare and initialize variables

        int count = 5;


        // Use increment and decrement operators

        count++; // Increment by 1

        System.out.println("After Increment: " + count);


        count--; // Decrement by 1

        System.out.println("After Decrement: " + count);

    }

}

Output:

After Increment: 6

After Decrement: 5


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