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About Question enthuware.ocajp.i.v7.2.1083 :
Posted: Wed Jan 29, 2014 3:20 pm
by 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
executes? The label
is
after the for loop that would increment i?
Thanks for any insight.
Re: About Question enthuware.ocajp.i.v7.2.1083 :
Posted: Wed Jan 29, 2014 10:30 pm
by 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.
Re: About Question enthuware.ocajp.i.v7.2.1083 :
Posted: Tue Oct 24, 2017 10:16 am
by 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!!
Re: About Question enthuware.ocajp.i.v7.2.1083 :
Posted: Tue Oct 24, 2017 10:22 am
by Javier
Because I see that counter++ is inside of the inner loop.
Re: About Question enthuware.ocajp.i.v7.2.1083 :
Posted: Tue Oct 24, 2017 3:40 pm
by 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++;
}
Re: About Question enthuware.ocajp.i.v7.2.1083 :
Posted: Tue Oct 24, 2017 9:51 pm
by 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.
Re: About Question enthuware.ocajp.i.v7.2.1083 :
Posted: Wed Oct 25, 2017 9:51 am
by 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
Re: About Question enthuware.ocajp.i.v7.2.1083 :
Posted: Wed Oct 25, 2017 11:45 am
by 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.
Re: About Question enthuware.ocajp.i.v7.2.1083 :
Posted: Wed Oct 25, 2017 11:48 am
by Javier
Sorry, I got it now, I was blocked and I wasn't doing good the inner loop