Enter Your PIN¶

Type in the following code, and get it to compile. This assignment will help you learn how to make a loop, so that you can repeat a section of code over and over again!

Name your file: pin.py

PIN = "12345"

print("WELCOME TO THE BANK OF GALLO.")
entry = input("ENTER YOUR PIN: ")

while entry != PIN:
    print("\nINCORRECT PIN. TRY AGAIN.")
    entry = input("ENTER YOUR PIN: ")


print("\nPIN ACCEPTED. YOU NOW HAVE ACCESS TO YOUR ACCOUNT.")

What You Should See¶

WELCOME TO THE BANK OF GALLO.
ENTER YOUR PIN: 90210

INCORRECT PIN. TRY AGAIN.
ENTER YOUR PIN: 11111

INCORRECT PIN. TRY AGAIN.
ENTER YOUR PIN: 12345

PIN ACCEPTED. YOU NOW HAVE ACCESS TO YOUR ACCOUNT.

Notice what happens when we type the correct PIN on the first try:

WELCOME TO THE BANK OF GALLO.
ENTER YOUR PIN: 12345

PIN ACCEPTED. YOU NOW HAVE ACCESS TO YOUR ACCOUNT.

What You Should Do on Your Own¶

Assignments turned in without these things will receive no credit.

  1. How is a while loop similar to an if statement?

  2. How is a while loop different from an if statement?

  3. What would we have to change in our program if the PIN was stored as an integer rather than a string? For example if it was initialized as PIN = 12345.

  4. Comment out the line entry = input(...) from inside the while loop. What happens? Why?

  5. (Uncomment the entry = input(...) before you turn in the assignment.)

©2021 Daniel Gallo

This assignment is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License.

Creative Commons License

Adapted for Python from Graham Mitchell’s Programming By Doing