// Zorah Fung
// This program illustrates scope. Global variables exist throughout the entire
// program. Local variables exist at declaration until the end of the method in which
// they were declared. Loop counters only exist inside of the loop.

public class ScopeExamples {
    public static int globalVariable = 0; // global variable -- BAD STYLE. ALWAYS.
    
    public static void main(String[] args) {
       int mainVariable = 0;
       int myVar = 0;
       
       System.out.println("1. Starting in main:");
       System.out.println("   mainVariable is now: " + mainVariable);
       System.out.println("   myVar is now: " + myVar);
       System.out.println("   globalVariable is now: " + globalVariable);
       System.out.println();       
       
       method();
        
       System.out.println("3. Back in main:");
       System.out.println("   mainVariable is now: " + mainVariable);
       System.out.println("   myVar is now: " + myVar);
       System.out.println("   globalVariable is now: " + globalVariable);
       System.out.println();
   }
    
   public static void method() {
      int myVar = 0;
      for (int i = 1; i <= 10; i++) {
         globalVariable++;
         myVar++;
      }
      System.out.println("2. In method:");
      System.out.println("   myVar is now: " + myVar);
      System.out.println("   globalVariable is now: " + globalVariable);
      System.out.println();
      
      // Won't compile. mainVariable and i are not in scope.
      // System.out.println("   mainVariable is now: " + mainVariable);
      // System.out.println("   i is now: " + i);
   }
}