CODEWITHSUNDEEP
javabooleanreturnbreak
and1can
and1can

Reputation: 79

how to return instead of break in java

I am writing an algorithm that returns true if three elements from a list a are able to sum up to three. Each element in a list can be repeated, so whenever there is a 0, I will have true. My question is not on the algorithm, albeit I do need a revision (an extra constraint) on the second if statement for this algorithm to be complete. After reading the responses, I have revised my code to just return. Now there is an output of nothing from my code, but I believe it is because I need to adjust my second condition. 

public class main {

public static void main(String args[]) {
int[] a = { -6, 2, 4 }; // true -6, 2, 4
// int [] a = {-6, 2, 5};  false
// int [] a = {-6, 3, 10, 200}; true -6, 3, 3
// int [] a = {8, 2, -1, 15}; true  2, -1, -1
// int [] a = {8, 2, -1, -1, 15}; true 2, -1, -1
// int [] a = {5, 1, 0, 3, 6}; true 0, 0, 0
sum(a);
}

public static boolean sum(int[] a) {
int x = 0;
int len = a.length;
boolean check = false;
while (x < len) {
    if (a[x] == 0) {

        check = true;

        if (check == true)
        {System.out.println("break time yo@");
        break;}
    }
    if (a[x] + a[x + 1] + a[x + 2] == 0 ) {
        check = true;
        if (check == true)
            {break;}
    }
    for (int i = 0; i <= len; i++) {
        if ((i == 2 * a[x]) || (2 * i == a[x])) {
            check = true;
            if (check == true)
                {break;}
        }
    }
    x += 1;
}

return check;
}

}

Upvotes: 1

Views: 505

Answers (3)

Nenad Bulatović
Nenad Bulatović

Reputation: 7434

Replace sum(a) with System.out.println(sum(a)); and you should get true or false printed in console.

Upvotes: 1

Kostas Kryptos
Kostas Kryptos

Reputation: 4111

For your problem, you don't even need a check variable. Just call return true; when required... and return false; after your while loop

Upvotes: 2

Alex K
Alex K

Reputation: 8338

You don't have to break for this sort of thing. Just replace your breaks with

return true;

When you return in Java, the code stops executing - it won't continue to run the result of your algorithm.

Just to give you an example, look at a method like this:

public boolean numberCheck(int number) {
    if(number == 20) {
        return true;
    }
    return false;
}

If the number is equal to 20, the method will return true and then stop - it won't go on to return false, because once the return is called, the execution effectively stops.

Upvotes: 3

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