ATM Pin No Validation using Python

this is tutorial will explains how to do the ATM Pin No Validation using Python step by step 4 different ways.

Method 1

pinno=123456789

flag=True
enter_pin = int(input("Enter your pin Number: "))
while flag:

    if(enter_pin!= pinno):
        print("Pin No is incorrect...")
        enter_pin=int(input("Re-Enter your pin Number: "))
    else:
        print("Pin No is correct...")
        flag=False

Method 2

pinno=123456789

enter_pin=int(input("Enter your pin Number"))
while enter_pin!=pinno:
    if enter_pin<0:
     print("Your have entered a wrong pin")
     break
    print("Your pin number is incorrect")
    enter_pin=int(input("RE-Enter your pin Number"))
else:
    print("Your pin no  success")

Method 3

pinno=123456789

flag=True

enter_pin=int(input("Enter your pin number: "))
while flag:
    if enter_pin!=pinno:
       if enter_pin<0:
        print("Your have entered a wrong pin")
        break
       print("Your Pin no incorrect")
       enter_pin=int(input("RE-Enter your pin number: "))
    else:
        print("Your Have Access ATM ")
        break

Method 4

pinno=123456789
enter_pin=int(input("Enter your pin Number"))
while enter_pin!=pinno:
    print("Your pin number is incorrect")
    enter_pin=int(input("RE-Enter your pin Number"))

print("Your pin no  success")

i have attached the video link below. which will do this tutorials step by step.