// Basic concepts of scope
// Dealing mostly with variables
// will eventually expand to methods

public class scope {
    public static void main(String[] args) {

	// Define $x$ local to scope of $main$:
	int x = 1;
	System.out.println("x (1): "+x);
	
	// Variables declared inside block {} are visible only inside
	// that block:
	{ 
	    int y = 1; 
	    System.out.println("y (1): "+y);
	    // Is $x$ visible? Yes, because it is declared outside the block,
	    // but in the same method:
	    System.out.println("x (2): "+x);
	}
	// You cannot compile the following, because $y$ is not visible:
	// System.out.println("y (2): "+y);
	
	// $for$ statements have the same effect -- variables are local inside,
	// as if a $for$ were a block:
	for(int z=0;z<=1;z++)
	    System.out.println("z (1): "+z);
	// Try printing $z$ from "outside":
	// System.out.println("z (1): "+z); // you can't!
	// To do so, declare $z$ outside of the $for$

    }

}