BankingProgram.py

# python banking program
def balance():
    print("total amount is $", amount)

def deposit():
    global amount
    credit = int(input("enter the deposit amount: "))
    while True:
        if credit < 0:
            print("Invalid amount")
            credit = int(input("enter the deposit amount: "))
        else:
            amount += credit
            print(f"{credit} is credited in your account, your total balance  is {amount}")
            break

def withdraw():
    global amount
    debit = int(input("enter the withdraw amount: "))
    while True:
        if debit <= 0:
            print("Invalid amount")
            debit = int(input("enter the withdraw amount: "))
        elif debit > amount:
            print("insufficient balance")
            debit = int(input("enter the withdraw amount: "))
        else:
            amount -= debit
            print(f"{debit} is debited now, total is {amount}")
            break

amount = 0

while True:
    print(" 1 to verify the balance: ")
    print(" 2 to deposit the amount:")
    print(" 3 to withdraw the amount: ")
    print(" Q to exit: ")
    choose = input("choose the options (1 - 3) or Q to exit: ").upper()
    if choose == "Q":
        print("EXIT - THANK YOU")
        break
    elif choose == "1":
        balance()
    elif choose == "2":
        deposit()
    elif choose == "3":
        withdraw()
    else:
        print("----INVALID-----")
        choose = input("choose the options (1 - 3) or Q to exit: ").upper()