AtmSimulation.java

/**
 * A simple ATM Simulation in Java
 * Features: PIN verification, Check Balance, Deposit, Withdraw
 */

 import java.util.Scanner;
public class AtmSimulation {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter the balance: ");
        int balance = sc.nextInt();

        System.out.print("Enter the pin: ");
        int pin = sc.nextInt();       


        System.out.print("Enter PIN: ");
        int enteredPin = sc.nextInt();

        if (enteredPin != pin) {
            System.out.println("Wrong pin exiting...");
            return;
        }

       
        while (true) {
            System.out.println("\n===== ATM Menu =====");
            System.out.println("1. Check Balance");
            System.out.println("2. Deposit");
            System.out.println("3. Withdraw");
            System.out.println("4. Exit");
            System.out.print("Choose option: ");

            int choice = sc.nextInt();

            switch (choice) {
                case 1:
                    System.out.println("Balance: " + balance);
                    break;

                case 2:
                    System.out.print("Enter amount to deposit: ");
                    int dep = sc.nextInt();
                    balance += dep;
                    System.out.println("Deposited: " + dep);
                    break;

                case 3:
                    System.out.print("Enter amount to withdraw: ");
                    int wd = sc.nextInt();
                    if (wd <= balance) {
                        balance -= wd;
                        System.out.println("Withdrawn: " + wd);
                    } else {
                        System.out.println("Insufficient balance!");
                    }
                    break;

                case 4:
                    System.out.println("Thank you for using ATM!");
                    return;

                default:
                    System.out.println("Invalid choice Try again!!");
            }
        }
    }
}