About Question enthuware.ocajp.i.v7.2.1083 :

[skeptic783]

Hi, newbie here. I was looking at question #85 on practice test #1:

Code: Select all

class LoopTest{
    public static void main(String args[]) {
        int counter = 0;
        outer:
        for (int i = 0; i < 3; i++) {
            middle:
            for (int j = 0; j < 3; j++) {
                inner:
                for (int k = 0; k < 3; k++) {
                    if (k - j > 0) {
                        break middle;
                    }
                    counter++;
                }
            }
        }
        System.out.println(counter);
    }
}

Why is it that i increments every time

Code: Select all

break middle;

executes? The label

Code: Select all

middle:

is after the for loop that would increment i?

Thanks for any insight.

[admin]

break middle causes only the middle loop (i.e. the j loop) to break. The i loop will continue normally and so i will increment after each iteration of i loop.

[Javier]

Hi!

I don´t see why after break middle is executed counter increments by one.

Is it not exactly the opposite? just when the if statement is not true the flow is going down to the counter++?

Thank you very much!!

[Javier]

Because I see that counter++ is inside of the inner loop.

[Javier]

I mean inside of the scope:
Does it mean is inside of the inner loop? because now I am very confuse

inner:
for (int k = 0; k < 3; k++) {
if (k - j > 0) {
break middle;
}
counter++;
}

[admin]

counter is incremented because the inner loop gets to complete a few iterations. See the output given in the explanation with an extra print statement. Observe the values of i, j, and k.

[Javier]

What I don´t understand is why counter++ is read only when is "break middle",
It shoudn´t be read aswell in the other cases?

for (int k = 0; k < 3; k++) {
if (k - j > 0) {
break middle;
}
counter++;// why the flow of the code is not going here when the condition of
//the if is false?
}
Thank you

[admin]

It IS going there when the condition is false! Try adding an extra print statement and run the code. That will help you understand the flow.

[Javier]

Sorry, I got it now, I was blocked and I wasn't doing good the inner loop