Project 10: Password Checker

Project 10: Password Checker

Check that a password is strong: at least 8 characters, with a number and a capital letter.

The goal

Ask for a password and report whether it passes each rule, printing helpful feedback.

What you practice

• len() and string methods
• Loops
• any() and all()
• Functions

Starter code

def check_length(pw):
    return len(pw) >= 8

def has_number(pw):
    return any(ch.isdigit() for ch in pw)

def has_capital(pw):
    return any(ch.isupper() for ch in pw)

password = input("Create a password: ")
print("Length ok:", check_length(password))
print("Has number:", has_number(password))
print("Has capital:", has_capital(password))

Step-by-step

1. Run the starter and test a few passwords.
2. Add a rule that requires at least one lowercase letter.
3. Combine all rules into one is_strong() function.
4. Print a clear message: strong or which rule is missing.
5. Loop until the user creates a strong password.

Checklist

• [ ] Length rule works
• [ ] Number rule works
• [ ] Capital rule works
• [ ] all() combines the rules
• [ ] Feedback is clear
• [ ] The program loops until success

TL;DR

• isdigit() and isupper() test characters.
• any() is True if any check passes.
• all() is True only when every check passes.