ATM code having simple function.py

#ATM

def deposit():
    amount=int(input("enter the amount you want to deposit"))
    global balance
    balance=balance+amount

def withdraw():
    amount=int(input("enter the amount you want to withdraw"))
    global balance
    balance -=amount

def check_balance():
    global balance
    print(f"your current balance is {balance} ")

balance=500
chances=3
for i in range(0,3):
    pin=int(input("enter your pin"))
    if pin==1234:
        while True:
            print(f"your current balance is {balance}")
            print("Enter your choice")
            print("1.withdraw  2.deposit   3.check balance")
            option=int(input())
            if option==1:
                withdraw()
            elif option==2:
                deposit()
            else:
                check_balance()
            print(f"Now your balance is {balance}")
            con=input("do you want yo continue Y or N ")
            if con=="N" or con=="n":
                break
            else:
                continue
    else:
        print("incorrect pin try again")
        chances -=1
        if chances==0:
            print("uabale to login")
            exit()