add atm lab 💸

Author: sbtries

1 Python/labs/10 ATM.md

@@ -0,0 +1,51 @@
+# Lab 12: ATM
+
+Let's represent an ATM with a class containing two attributes: a balance and an interest rate. A newly created account will default to a balance of 0 and an interest rate of 0.1%. Implement the initializer, as well as the following functions:
+
+- `check_balance()` returns the account balance
+- `deposit(amount)` deposits the given amount in the account
+- `check_withdrawal(amount)` returns true if the withdrawn amount won't put the account in the negative
+- `withdraw(amount)` withdraws the amount from the account and returns it
+- `calc_interest()` returns the amount of interest calculated on the account
+
+
+```python
+atm = ATM() # create an instance of our class
+print('Welcome to the ATM')
+while True:
+    command = input('Enter a command: ')
+    if command == 'balance':
+        balance = atm.check_balance() # call the check_balance() method
+        print(f'Your balance is ${balance}')
+    elif command == 'deposit':
+        amount = float(input('How much would you like to deposit? '))
+        atm.deposit(amount) # call the deposit(amount) method
+        print(f'Deposited ${amount}')
+    elif command == 'withdraw':
+        amount = float(input('How much would you like '))
+        if atm.check_withdrawal(amount): # call the check_withdrawal(amount) method
+            atm.withdraw(amount) # call the withdraw(amount) method
+            print(f'Withdrew ${amount}')
+        else:
+            print('Insufficient funds')
+    elif command == 'interest':
+        amount = atm.calc_interest() # call the calc_interest() method
+        atm.deposit(amount)
+        print(f'Accumulated ${amount} in interest')
+    elif command == 'help':
+        print('Available commands:')
+        print('balance  - get the current balance')
+        print('deposit  - deposit money')
+        print('withdraw - withdraw money')
+        print('interest - accumulate interest')
+        print('exit     - exit the program')
+    elif command == 'exit':
+        break
+    else:
+        print('Command not recognized')
+```
+
+## Version 2
+
+Have the ATM maintain a list of transactions. Every time the user makes a deposit or withdrawal, add a string to a list saying 'user deposited $15' or 'user withdrew $15'. Add a new method `print_transactions()` to your class for printing out the list of transactions, and add a `transactions` option to your REPL loop.
+