Java boolean statements are the backbone of decision-making logic. Let’s shine a spotlight on how they work 🔦

✅ What is a Boolean?

A boolean is a data type in Java that can only have one of two values:

true    // yep, it's true
false   // nope, it's false

You use booleans to make choices, test conditions, and control the flow of your code.

🧪 Boolean Variables

You can declare and use boolean variables like this:

boolean isRunning = true;
boolean isNight = false;

🔍 Boolean Expressions (Conditions)

These are statements that evaluate to true or false based on comparisons:

int age = 25;
boolean isAdult = age >= 18; // true

Boolean expressions often use:

• == (equal to)
• != (not equal to)
• > < >= <= (greater/less than)
• && (AND), || (OR), ! (NOT)

Example:

boolean canEnter = age > 18 && age < 65;

⚙️ In If-Else Statements

Booleans often control which path your code takes:

boolean isSunny = true;

if (isSunny) {
    System.out.println("Grab your sunglasses!");
} else {
    System.out.println("Better take an umbrella.");
}

🔁 Boolean Methods

You can write methods that return boolean values:

boolean isEven(int num) {
    return num % 2 == 0;
}

Then use it like:

System.out.println(isEven(6)); // prints true