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Index › Programming Questions & Help › Syntax Questions › function returning true or false
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function returning true or false (Read 562 times)
controller
function returning true or false
Jan 31st, 2006, 9:47pm  
Hi!

I always get an error with the following code:

boolean pressed() {
   if (mousePressed == true && mouseX < x) {
     return true;
   }
}

Processing always says

"The method 'boolean pressed();' must contain a return statement with an expression compatible with type 'boolean'"

but true would be a compatible type in my opinion.

So what's wrong with my code?


controller
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FloHimself
Re: function returning true or false
Reply #1 - Jan 31st, 2006, 9:59pm  
Just a hint: what does the funtion return, if the if-condition is false?
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cello
Re: function returning true or false
Reply #2 - Feb 1st, 2006, 2:00am  
Or if you want to be slick about it:

boolean pressed() {
 return mousePressed && mouseX < x;
}
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Ira
Re: function returning true or false
Reply #3 - Feb 1st, 2006, 2:59am  
controller,
cleverness aside, your return statement needs to be outside of the nested if.
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mflux
Re: function returning true or false
Reply #4 - Feb 1st, 2006, 8:50am  
Alternatively, you could include an else statement.

Either way the idea is this.. if a function has a return.. it MUST return in all cases, and in your situation.. there would be NO return if the condition is false.

So:
Add an else statement
or
Put it outside the conditional
or
Do it the "clever" way :]
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