What exactly is going on here? If the condition is met, "return true". If it's not, "return false"....which means?...

What do the return statements, in this case, do?

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"Under the hardness of her facade a woman's heart is still beating."

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The function will return true if the score is between 0 and 100, including 0 and 100. If its lower then 0 or higher then 100 then it will return false.

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But how does that validate the value? I mean...what does that do? True/False doesn't get printed out so what happens? You call the method and then...it checks...but then what happens with/to the true/false?

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"Under the hardness of her facade a woman's heart is still beating."

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Quote: from Ethryx at 3:57 pm on Oct. 29, 2008

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The function will return true if the score is between 0 and 100, including 0 and 100. If its lower then 0 or higher then 100 then it will return false.

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But how does that validate the value? I mean...what does that do? True/False doesn't get printed out so what happens? You call the method and then...it checks...but then what happens with/to the true/false?

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int Score = 85;
boolean ScoreValid;

ScoreValid = validateScore(Score);
if(ScoreValid == true)
{
// put coding here when the user entered a valid score between 0 and 100
}
else
{
// this would be an error since the score is either lower then 0 or higher then 100. tell the user to re-enter the score
}

** As you can see, the function validateScore (which you wrote the coding to above) is going to return a true/false value to, in this case, the variable ScoreValid based on the integer that is passed too it (Score). If the variable Score contains a number between 0 and 100, ScoreValid will be true because validateScore will set it to true. If it is below 0 or above 100, ScoreValid will be false because validateScore will set it to false. The user of this java program does not see this true/false value. This is just a way of checking that a valid 'score' was submitted and not something else.

Hope that helps, let me know if you still don't understand.

Post edited at 1:29 pm on Oct. 29, 2008 by Ethryx

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This means that any boolean value, once computed, will have a value of true or false.

Some examples of boolean values:
true
false
(x > 7) (true if x is > 7, false if x<=7)
validateScore(100) (true)
validateScore(30) (true)
validateScore(-5) (false)

The method 'validateScore' returns a boolean value to wherever it is called.  These boolean values can be used in if() statements and while() statements, and places like that. Within the () there must be a boolean value.

Post edited at 6:26 pm on Oct. 29, 2008 by matto

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Twilight is upon me, and soon, night must fall.
That is the way of things. The way of the Force."
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