Question

public class Shape 
{
    public static void main(String args[]){
        int num = 0;
        cng(num);
    }

    public static void cng(int x){
        x = 52;
        System.out.println(x);
    }

}

As you can see, in the cng Method I set the value of x to 52 and then print out the value of x.

Then, back in the main method, the cng method is performed on the num variable.

What I want to do, however is set the value of 52 to x without the System.out.println(x);
function in my cng method and print out the value in my main method. How would I go about doing that?

I tried doing

public static void cng(int x){
    x = 52;
}

and then

public static void main(String args[]){
    int num = 0;
    cng(num);
    System.out.println(num);
}

but it only prints out a 0
because num is set to 0. I thought that performing cng on the num variable would change it to 52, but it doesn’t.

Answer 1

read along the comments :

public class Shape 
{

    public static void main(String args[]){
    int num = 0;
    num = cng();   //store value returned by cng() in num
    System.out.println("num : " +num); // display num
    }

    public static int cng(){    //change return type to int
    return 52;
    }

}