What is a boolean type?

It was the first word I saw while studying, so I scribbled it in my own way while referring to it. I will continue to do it.

What is boolean type?

A boolean type is data that is determined to contain either true or false data. You don't need anything other than true false.

(Tentative)


public static boolean isHealthy(double bmi) {
    return bmi >= 18.5 && bmi < 25.0;
}
if (isHealthy(bmi)) {
    system.out.println("I'm healthy");
} else {
    System.out.println("Not healthy");
}

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