Why we are using boolean function i am not clear about that .. please help me ..

Hello,

A boolean variable can hold one of two values true or false.

It is used widely to direct the line of execution of code depending on the outcomes of comparisons or tests.

Here is a silly example that shows how a boolean can be used to direct the flow of code execution. It may not help; sorry if it doesn't!

The key bit is mealsEatenToday < 3 - this is a comparator that asks "is mealsEatenToday less than 3" - that creates a true/false answer. There are no other outcomes possible. The code then sets the isHungry boolean to true or false depending on the value, as above.

int mealsEatenToday; 
boolean isHungry;

mealsEatenToday = functionToGetMealNumber(); // this just returns a number between 1 and 5.
        // It doesn't matter how it works, this code is fictional

if (mealsEatenToday < 3) {
  isHungry = true;
} else {
  isHungry = false;
}

I'm no teacher, unfortunately. That's the best I can come up with to try to help you out.

A Boolean can hold a true or false value and is often the result of comparing two things;

• 1 is less than 2 - true
• 64 is more than 32 - true
• 16 is more than 32 - false
• This is a good example - false

I hope that all helps!

Steve.