I add a function that accepts a parameter when called? And how can I make one of my functions use a return statement to pass data out of the function

How do I add a function that accepts a parameter when called? And how can I make one of my functions use a return statement to pass data out of the function? Where in my script can I make these modifications?

import sys

#account balance 

account_balance = float(500.25)

#printbalance function

def balance():

 print(“Your current balance:n” + str(account_balance))

#deposit function

def deposit():

 global account_balance

 deposit_amount = input(“How much would you like to deposit today?n”)

 account_balance += float(deposit_amount)

 print(“Deposit was $” + str(‘%.2f’ % float(deposit_amount)) + “, current balance is $” + str(account_balance))

#withdraw function

def withdraw():

 global account_balance

 withdraw_amount = input(“How much would you like to withdraw today?n”)

 if float(withdraw_amount) > account_balance:

  print(“$” + str(‘%.2f’ % float(withdraw_amount)) + “is greater than your account balance of $” + str(‘%.2f’ % float(account_balance)))

 else:

  account_balance -= float(withdraw_amount)

  print(“Withdrawal amount was $” + str(‘%.2f’ % float(withdraw_amount)) + “, current balance is $” + str(‘%.2f’ % float(account_balance)))

def quit():

 print(“Thank you for banking with us.”)

#User Input 

userchoice = input (“What would you like to do?n”)

if (userchoice == ‘D’): 

 deposit ()

if (userchoice ==’B’):

 balance()

if (userchoice == ‘W’):

 withdraw ()

if (userchoice == ‘Q’):

 quit()

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