// Basic concepts of scope
// Dealing mostly with variables; will eventually expand to methods
// Author: David Schwartz, dis@cs.cornell.edu
// Modified by: Kiri Wagstaff, wkiri@cs.cornell.edu

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,
	    // and in the same method:
	    System.out.println("x (2): " + x);
	}
	// You cannot compile the following, because y is not visible:
	// (Try uncommenting it to see what the compiler says)
	// 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 loop.
    }
}