q3.java

// q3.java - Literals, Increment/Decrement Operators, and Expressions Demo
// Complete the fill-in-the-blanks to demonstrate various Java concepts
public class q3 {
    public static void main(String[] args) {
        System.out.println("=== Java Literals and Operators Demo ===\n");

        // Part 1: Different types of literals
        System.out.println("=== Part 1: Literals Demo ===");

        int decimal = 42;
        int binary = 0b101010;
        int octal = 052;
        int hex = 0x2A;

        System.out.println("Decimal literal: " + decimal);
        System.out.println("Binary literal: " + binary);
        System.out.println("Octal literal: " + octal);
        System.out.println("Hexadecimal literal: " + hex);

        float floatNum = 3.14f;
        double doubleNum = 2.718281828;

        System.out.println("Float literal: " + floatNum);
        System.out.println("Double literal: " + doubleNum);

        char letter = 'A';
        char unicodeChar = '\u0041';

        System.out.println("Character literal: " + letter);
        System.out.println("Unicode character: " + unicodeChar);

        boolean isTrue = true;
        String message = "Hello, Java!";

        System.out.println("Boolean literal: " + isTrue);
        System.out.println("String literal: " + message);

        System.out.println("\n=== Part 2: Increment/Decrement Operators ===");

        int counter = 10;
        System.out.println("Initial counter value: " + counter);

        System.out.println("Post-increment (counter++): " + counter++);
        System.out.println("Counter after post-increment: " + counter);

        System.out.println("Pre-increment (++counter): " + ++counter);
        System.out.println("Counter after pre-increment: " + counter);

        System.out.println("Post-decrement (counter--): " + counter--);
        System.out.println("Counter after post-decrement: " + counter);

        System.out.println("Pre-decrement (--counter): " + --counter);
        System.out.println("Counter after pre-decrement: " + counter);

        System.out.println("\n=== Part 3: Data Type of Expressions ===");

        int intVar = 5;
        double doubleVar = 2.5;
        float floatVar = 1.5f;
        char charVar = 'B';

        int result1 = intVar + 3;
        double result2 = intVar + doubleVar;
        double result3 = floatVar + doubleVar;
        int result4 = charVar + intVar;

        System.out.println("int + int = " + result1 + " (Type: int)");
        System.out.println("int + double = " + result2 + " (Type: double)");
        System.out.println("float + double = " + result3 + " (Type: double)");
        System.out.println("char + int = " + result4 + " (Type: int, 'B' has ASCII value 66)");

        System.out.println("\n=== Part 4: Operator Associativity ===");

        int a = 20, b = 10, c = 5;
        int result5 = a - b - c;

        System.out.println("Left-to-right: " + a + " - " + b + " - " + c + " = " + result5);
        System.out
                .println("Evaluation: (" + a + " - " + b + ") - " + c + " = " + (a - b) + " - " + c + " = " + result5);

        int x, y, z;
        x = y = z = 15;

        System.out.println("Right-to-left assignment: x = y = z = 15");
        System.out.println("x = " + x + ", y = " + y + ", z = " + z);
    }
}