[Swift Apple ] 7. True or False (Bool) - Peter Coding IT World

✅ 7. True or False (Bool)

Hello! 😊, In this lesson, we’re going to learn about something called Bool in Swift.

A Bool is a special data type that can only be true or false.

Think about questions like:

• Did I do my homework?

• Is it nighttime right now?

If you can answer with yes or no, or true or false,

then you’re using the Bool concept!

🤔 What Does True or False Mean?

In Swift, a Bool can only have one of two values:

• true — yes, correct, or it’s happening

• false — no, wrong, or it’s not happening

Here’s an example:

var isSunny = true
var isRaining = false

• isSunny is true → the sun is out! ☀️

• isRaining is false → it’s not raining! ☔

💡 Don’t forget: true and false must be written in lowercase!

 

🧪 Practice: Did I Do My Homework Today?

Let’s create a small app that tells us whether or not we did our homework today!

var didHomework: Bool = true

if didHomework {
    print("Great job! You did your homework 🎉")
} else {
    print("Oops! You haven’t done your homework yet 😅")
}

Output:

Great job! You did your homework 🎉

Now change the value:

didHomework = false

You’ll get this output:

Oops! You haven’t done your homework yet 😅

✅ When Do We Use Bool?

Bool values are used when we want to check a condition,

and choose what the program should do next.

Some examples:

• Is the door open? → isDoorOpen = true

• Is the user logged in? → isLoggedIn = false

• Is the score 90 or more? → score >= 90 → result is true or false!

✨ Wrapping Up

Today, we learned about the Bool type in Swift:

• true = yes, correct

• false = no, not true

• Bools are used with if statements to make decisions

Now you can answer questions like “Is this true?” using Swift code — awesome! 😄

In the next lesson, we’ll learn how to repeat actions using something called a loop.

The topic will be: 🔁 Repeating with For Loops!