import sys

#account balance
account_balance = float(500.25)

def helper(operation, amount):
  global account_balance
  print('%s was $%.2f, current balance is $%.2f' %(operation, amount, account_balance))

#printbalance function
def printbalance():
  global account_balance
  print('Your current balance: \n%.2f' % account_balance)

#deposit function
def deposit():
  global account_balance
  deposit_amount = float(input("How much would you like to deposit today?\n"))
  account_balance += deposit_amount
  print('Deposit was $%.2f, current balance is $%.2f' %(deposit_amount, account_balance))


#withdraw function
def withdraw():
  global account_balance
  while True:
    withdrawal_amount = float(input("How much would you like to withdraw today?\n"))
    if(withdrawal_amount > account_balance):
      print('$%.2f is greater than your account balance of $%.2f' %(withdrawal_amount, account_balance))
    else:
      account_balance -= withdrawal_amount
      print('Withdrawal was $%.2f, current balance is $%.2f' %(withdrawal_amount, account_balance))
      break

#User Input goes here, use if/else conditional statement to call function based on user input

userchoice = input("What would you like to do?\n")

if (userchoice == 'D'):
  deposit()
elif (userchoice == 'W'):
  withdraw()
elif (userchoice == 'B'):
  printbalance()
else:
  print('Thank you for banking with us.')