if_else

import java.util.Scanner;
public class if_else {
    public static void main(String[] arguments){
        Scanner scanner = new Scanner(System.in);
    // if statement examples
        // TODO: write a program to check if a number is odd or even
        System.out.print("Enter a number: ");
        int number = scanner.nextInt();

        if (number % 2 == 0) {
            System.out.println(number + " is even.");
        } else {
            System.out.println(number + " is odd.");
        }


        // TODO: if a person is eligible to vote based on their age
        System.out.print("Enter your age: ");
        int age = scanner.nextInt();
        if (age >= 18) {
            System.out.println("You are eligible to vote.");
        } else {
            System.out.println("You are not eligible to vote.");
        }


        // TODO: Check if a number is positive, negative, or zero
        System.out.print("Enter a number: ");
        int theNumber = scanner.nextInt();

        if (theNumber > 0) {
            System.out.println("The number is positive.");
        } else if (theNumber < 0) {
            System.out.println("The number is negative.");
        } else {
            System.out.println("The number is zero.");
        }


        // TODO: Find the maximum of three numbers using if
        System.out.print("Enter the first number: ");
        int num1 = scanner.nextInt();
        System.out.print("Enter the second number: ");
        int num2 = scanner.nextInt();
        System.out.print("Enter the third number: ");
        int num3 = scanner.nextInt();

        if (num1 > num2 && num1>num3) {
            System.out.println("The maximum number is: " + num1);
        } else if (num2 > num1 && num2 > num3) {
            System.out.println("The maximum number is: " + num2);
        } else {
            System.out.println("The maximum number is: " + num3);
        }


        /* TODO: This program simulates basic ATM operations, allowing users
            to either add money to their account or withdraw money.
            It includes necessary checks for withdrawal limits,
            account balance, and deposit amounts.
         */
        double accountBalance = 500.0;
        String message = "";

        System.out.println("Welcome to ATM! Your balance is $" + accountBalance);

        System.out.println("Enter 1 to add money or 2 to withdraw money:");
        int choice = scanner.nextInt();

        if (choice == 1) {
            System.out.print("Enter the amount to add: ");
            double depositAmount = scanner.nextDouble();
            if (depositAmount > 0) {
                accountBalance += depositAmount;
                message = "You added $" + depositAmount +
                        ". Your new balance is $" + accountBalance + ".";
            } else {
                message = "Failed! Deposit amount must be greater than $0.";
            }
        } else if (choice == 2) {
            System.out.print("Enter the amount to withdraw: ");
            int withdrawalAmount = scanner.nextInt();
            if (withdrawalAmount >= 10) {
                if (withdrawalAmount <= accountBalance) {
                    accountBalance -= withdrawalAmount;
                    message = "You withdrew $" + withdrawalAmount +
                            ". Your balance is $" + accountBalance + ".";
                } else {
                    message = "Failed! Insufficient amount. Current balance: $" + accountBalance + ".";
                }
            } else {
                message = "Transaction failed! Minimum withdrawal amount is $10.";
            }
        } else {
            message = "Invalid choice! Please select either 1 or 2.";
        }
        System.out.println(message);



        /* TODO: This program calculates discounts, loyalty points, and
            the final price based on the total amount spent.
            It applies a percentage discount, adds tax, and displays
            the final amount after deductions.
         */
        int loyaltyPoints = 0;
        double discount = 0;

        System.out.print("Enter the total amount spent: $");
        double amountSpent = scanner.nextDouble();

        if (amountSpent >= 100) {
            discount = 0.20; // 20% discount
        } else if (amountSpent >= 50) {
            discount = 0.10; // 10% discount
        } else if (amountSpent >= 20) {
            discount = 0.05; // 5% discount
        }

        loyaltyPoints = (int) (amountSpent / 10); // 1 point for every $10

        // Calculate final amount after applying discount
        double discountedAmount = amountSpent - (amountSpent * discount);

        // Apply tax (8% for example)
        double tax = discountedAmount * 0.08;
        double finalAmount = discountedAmount + tax;

        System.out.println("Original Amount: $" + amountSpent);
        if (discount > 0) {
            System.out.println("You qualify for a " + (discount * 100) + "% discount!");
            System.out.println("Discounted Amount: $" + discountedAmount);
        } else {
            System.out.println("No discount available for this amount.");
        }
        System.out.println("Loyalty Points Earned: " + loyaltyPoints + " points");
        System.out.println("Tax (8%): $" + tax);
        System.out.println("Total amount to pay after discount and tax: $" + finalAmount);





        // TODO: check if a number is odd or even using shorthand if
        System.out.print("Enter a number: ");
        int num = scanner.nextInt();
        String res = (num % 2 == 0) ? "The number is even" :
                "The number is odd";
        System.out.println(res);

        // TODO: find large number between two numbers using shorthand if
        int num_1 = 45;
        int num_2 = 30;
        int largerNumber = (num_1 > num_2) ? num_1 : num_2;
        System.out.println("Larger number: " + largerNumber);

        // TODO: multi condition using shorthand if
        int score = 85;
        String grade =  (score >= 90) ? "A" :
                        (score >= 75) ? "B" :
                        (score >= 60) ? "C" :
                                "D";
        System.out.println("Grade: " + grade);


        scanner.close();
    }
}