created basic banking app in console

practice_projects/src/Banking.java

@@ -0,0 +1,77 @@
+import java.util.Scanner;
+
+public class Banking {
+
+    static Scanner scanner = new Scanner(System.in);
+
+    public static void main(String[] args){
+
+        double balance = 0.00;
+        boolean isRunning = true;
+
+        while(isRunning) {
+            System.out.println("");
+            System.out.println("***************");
+            System.out.println("BANKING PROGRAM");
+            System.out.println("***************");
+            System.out.println("1. Show Balance");
+            System.out.println("2. Deposit");
+            System.out.println("3. Withdraw");
+            System.out.println("4. Exit");
+            System.out.println("***************");
+            System.out.print("Enter your choice (1-4): ");
+
+            int choice = scanner.nextInt();
+
+            switch (choice) {
+                case 1 -> balance(balance);
+                case 2 -> balance += deposit();
+                case 3 -> balance -= withdraw(balance);
+                case 4 -> isRunning = false;
+                default -> System.out.println("Invalid choice");
+            }
+        }
+
+        System.out.println("***************");
+        System.out.println("Have a nice day!");
+        System.out.println("***************");
+
+        scanner.close();
+
+
+    }
+
+    static void balance(double balance){
+        System.out.println("***************");
+        System.out.printf("$%.2f\n", balance);
+    }
+
+    static double deposit(){
+        System.out.print("Enter amount to deposit: ");
+        double amount = scanner.nextDouble();
+
+        if(amount < 0){
+            System.out.println("Amount can't be negative! ");
+            return 0;
+        } else {
+            return amount;
+        }
+
+    }
+
+    static double withdraw(double balance){
+        System.out.print("Enter amount to withdraw: ");
+        double amount = scanner.nextDouble();
+
+        if(amount < 0){
+            System.out.println("Amount can't be negative! ");
+            return 0;
+        } else if (amount > balance){
+            System.out.println("INSUFFICIENT FUNDS!");
+            return 0;
+        } else {
+            return amount;
+        }
+    }
+
+}