diff --git a/Oops concepts in python.   Class . b/Oops concepts in python.   Class .
new file mode 100644
index 0000000..6d5077c
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+++ b/Oops concepts in python.   Class .	
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+# Base class: BankAccount
+class BankAccount:
+    def __init__(self, account_number, owner, balance=0):
+        self.account_number = account_number
+        self.owner = owner
+        self.balance = balance
+
+    def deposit(self, amount):
+        if amount > 0:
+            self.balance += amount
+            print(f"Deposited {amount}. New balance: {self.balance}")
+        else:
+            print("Deposit amount must be positive.")
+
+    def withdraw(self, amount):
+        if amount > 0 and amount <= self.balance:
+            self.balance -= amount
+            print(f"Withdrew {amount}. New balance: {self.balance}")
+        else:
+            print("Insufficient balance or invalid withdrawal amount.")
+
+    def display_balance(self):
+        print(f"Account Number: {self.account_number} | Owner: {self.owner} | Balance: {self.balance}")
+
+# Derived class: SavingsAccount
+class SavingsAccount(BankAccount):
+    def __init__(self, account_number, owner, balance=0, interest_rate=0.01):
+        super().__init__(account_number, owner, balance)
+        self.interest_rate = interest_rate
+
+    def apply_interest(self):
+        interest = self.balance * self.interest_rate
+        self.balance += interest
+        print(f"Interest of {interest} applied. New balance: {self.balance}")
+
+# Derived class: CheckingAccount
+class CheckingAccount(BankAccount):
+    def __init__(self, account_number, owner, balance=0, overdraft_limit=500):
+        super().__init__(account_number, owner, balance)
+        self.overdraft_limit = overdraft_limit
+
+    def withdraw(self, amount):
+        if amount > 0 and (self.balance + self.overdraft_limit) >= amount:
+            self.balance -= amount
+            print(f"Withdrew {amount}. New balance: {self.balance}")
+        else:
+            print("Withdrawal exceeds overdraft limit
diff --git a/README.md b/README.md
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--- a/README.md
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-# FlutterClass
-
-More details : https://github.com/ViluppuramGLUG/FlutterClass/tree/main/vglug