Adding Reply Archived Topic: It will not be bumped to the top of the forum. Topic Return Statements (Java) Membername   Not a member? Sign Up Free (takes 20 seconds) Password   Forgotten your password? Post Font: Verdana Arial Black Georgia Comic Sans Impact   Size: Tiny Normal Big Huge   Color: Default Dark Red Red Orange Brown Green Olive Cyan Blue Dark Blue Indigo Black [ Check Spelling ] [ Post Preview ] [ LiveTags ] FAQ Keyword Search: Post Options Favorites Manager Notify me of new replies to this topic by email Notify me of new replies to this topic by private message Original Post Majo Posted at 12:55 pm on Oct. 29, 2008 Code: public boolean validateScore(int score) { if((score >= 0) && (score <= 100)) { return true; } return false; } 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?

Replies matto Posted at 6:22 pm on Oct. 29, 2008 'boolean' is a data type that holds two possible values: true or false.  Just like 'int' and 'char' are kinds of data types. 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. Ethryx Posted at 1:28 pm on Oct. 29, 2008 Quote: from Majo at 4:03 pm on Oct. 29, 2008 Quote: from Ethryx at 3:57 pm on Oct. 29, 2008 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.   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? Let me put this into a real example for you: 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. Majo Posted at 1:03 pm on Oct. 29, 2008 Quote: from Ethryx at 3:57 pm on Oct. 29, 2008 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. 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? Ethryx Posted at 12:57 pm on Oct. 29, 2008 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. UltimaTaz Posted at 12:57 pm on Oct. 29, 2008 Looks like it's a fail-fail test. All 5 previous replies displayed.