🔓 Understanding the do-while Loop

You already know about for and while loops. But what about the do-while loop? It’s a cool one—and a bit different.

🧠 Think of It Like This:

“Do this thing first, then keep doing it while the condition is true.”

🧩 How It Works:

  1. do — Do something once, no matter what.

  2. while (condition) — Check the condition after doing it.

    • If it’s true, repeat.
    • If it’s false, stop.

🎮 Example: Number Guessing Game

Imagine a friend is guessing a number between 1 and 10. They must guess at least once, right?

int guess;

do {
    printf("Guess a number between 1 and 10: ");
    scanf("%d", &guess);
} while (guess != secretNumber);

printf("You got it!\n");

💡 Even if the first guess is correct, the loop still runs once before checking.

⚡ Why Use do-while?

Use it when you want the code to run at least once, even if the condition is false right away. That’s the key difference from while and for.

📝 Quick Quiz

Q1: What makes the do-while loop different from the while loop?

(a) It always runs the code block at least once (b) while loops always run once (c) do-while is only for counting (d) while is only for conditions

Q2: Which loop would you use if you want a user to enter a character until they type 'q'?

(a) for — best for fixed repeats (b) while — only checks first (c) do-while — ensures at least one prompt (d) None of the above

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