Welcome back! In Part 2, we learned how to make decisions with if, elif, else, and logic. Now it’s time to make your code repeat itself — a superpower every hacker, analyst, or automation wizard needs.

🔁 Part 3: while Loops — Repeat Until a Condition is False

A while loop runs as long as a condition is true:

count = 0

while count < 5:
    print("Count is:", count)
    count += 1

🧠 Think: “While this is still true, keep looping.”

🧯 Infinite Loops (And How to Escape)

If the condition never becomes false, your code loops forever.

while True:
    command = input("Type 'exit' to quit: ")
    if command == "exit":
        break

• break exits the loop entirely
• continue skips the rest of the current loop and goes back to the top

🔁 Part 4: for Loops — Loop Through Lists, Ranges, and More

A for loop is best when you know how many times to repeat, or you want to go through something like a list or string.

tools = ["nmap", "curl", "burp", "wireshark"]

for tool in tools:
    print("Tool:", tool)

You can use for to loop through:

• Lists
• Strings
• Files
• Anything iterable

🔢 Using range() to Loop N Times

for i in range(5):
    print("Looping:", i)

This will loop 5 times, with i going from 0 to 4.

🔐 Real Example: Password Guess Loop

Let’s say we want to limit login attempts:

password = "hunter2"
attempts = 0

while attempts < 3:
    guess = input("Enter password: ")
    if guess == password:
        print("✅ Access granted.")
        break
    else:
        print("❌ Try again.")
        attempts += 1

🧠 Loop Tips and Good Practices

• ✅ Use for when looping through things you know
• ✅ Use while when you need to repeat until something happens
• 🧯 Always give your while loops an exit path
• 🧼 Use break to stop early, and continue to skip a loop round
• 🧙‍♂️ Indentation = life in Python. Keep your blocks clean

⏭️ Coming Up Next: Lists, Indexing, and Looping with Power

We’ll dig into:

• Indexes and slicing
• Building lists dynamically
• Nested loops
• Looping with enumerate() and zip()

Ready to keep going? Or want a mini challenge to try out loops right now?