Putting the Pieces Together

You've learned the four core building blocks separately. Real programs combine them. Let's read one small program that uses all four — slowly, like detectives.

A tiny guessing-game checker

Imagine a game where the secret number is 7, and we check three guesses someone made:

secret = 7
guesses = [4, 7, 9]

for each guess in guesses:
    if guess == secret:
        show "Correct! You found it."
    else:
        show "Nope, keep trying."

Let's read it line by line

1. secret = 7 — a variable stores the secret number.
2. guesses = [4, 7, 9] — another variable stores a list of three guesses.
3. The loop (for each guess) runs once per guess, in sequence.
4. Inside the loop, the decision (if) checks whether the current guess equals the secret.
5. Depending on the answer, it shows one message or the other.

What does it display?

Let's play computer and walk through each loop pass:

• guess is 4 → 4 == 7? No → show "Nope, keep trying."
• guess is 7 → 7 == 7? Yes → show "Correct! You found it."
• guess is 9 → 9 == 7? No → show "Nope, keep trying."

So the output is:

Nope, keep trying.
Correct! You found it.
Nope, keep trying.

That's a real program's skeleton

Notice that this tiny example has the shape of countless real programs: store some data, loop over it, make a decision each time, and produce output. The four building blocks aren't just theory — they genuinely combine to do useful work.

In the next two lessons, you'll stop reading pretend code and run real code yourself. Get ready!