/*
 * Explore the java rules of Scope -- ie when variables are alive
 * 
 * Created: August 2023
 * @author gtowell
 * adapted from c murphy
 */
public class Scoper {
    public static void main(String[] args) {

        int a = 4;
        int b = 1;
        if (b > 0) {
            a = 3;
        }
        System.out.println(a); // okay!

        int x = 5;
        if (x > 0) {
            int y = 7;
            System.out.println(x + y);
        }
        System.out.println(y); // no!

        int m = -2;
        int n = 4;
        if (n > 0) {
            int m = 2; // no! allowed in some cases but not here
        }
        System.out.println(m + n);
    }
}