How does one make a boolean return function?

Programming Questions

danielapt

How does one make a boolean return function?

in Programming Questions • 7 months ago

I've been trying to make a function return either true or false. But I don't know what I'm doing wrong…

String a = "hello";
String b = "how are you?";
boolean check(){
if(a == b){
return true;
} else {
return false;
}
}
println(check());

Replies(7)

asimes

Re: How does one make a boolean return function?

7 months ago

You have to use equals() for comparing Strings. Also, you don't have to use if and else for a boolean, this will work:

String a = "hello";
String b = "how are you?";
void setup() {
size(200, 200);
println(check());
}
void draw() {
}
boolean check() {
return a.equals(b);
}

danielapt

Re: How does one make a boolean return function?

7 months ago

Thanks! I've tried using the code you posted, but I get the following error:

Syntax error on token "boolean", Identifier expected

What's going on?

asimes

Re: How does one make a boolean return function?

7 months ago

Did you copy / paste the whole thing, including setup()? Without setup() it won't work (I just put draw() so that the window can be closed by hitting ESC)

danielapt

Re: How does one make a boolean return function?

7 months ago

I can confirm that I've used exactly what you posted (and nothing else).

GoToLoop

Re: How does one make a boolean return function?

7 months ago

so that the window can be closed by hitting ESC)so that the window can be closed by hitting ESC)

noLoop(); also works for it! Or force a close by exit();!

No need for an empty draw() {...}!

asimes

Re: How does one make a boolean return function?

7 months ago

As GoToLoop points out, exit() would work just fine as well for this kind of test. This is the exact same code but without draw() (and using exit()). I'm running Processing 2.0b8 and it works:

String a = "hello";
String b = "how are you?";
void setup() {
size(200, 200);
println(check());
exit();
}
boolean check() {
return a.equals(b);
}

Edit: (The old code also works for me)

danielapt

Re: How does one make a boolean return function?

7 months ago

Yes, that works for me. I had named the file I was working with boolean.pde, and that was conflicting. Thank you for your help!

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