public class Scope1
{
  public static double x;	// this has what is called "class scope"
				//  we'll study more about this later

  public static void main(String[] args)
  {
     double a, b, c;	// local variables to main()
     double x, y, z;	// local variables to main()
  			//  NOT the same x, y, z as in the average method
			//  and NOT the same x as the class variable x

     a = 1.3;   b = 2.5;   c = 6.8;

     // arguments in a function call do NOT have to have the same
     //  names as formal function parameters

     x = average(a, b, c);	// local x (to main()) being used here
     System.out.println("average = " + x);

     if (x > 10)
     {
         int var1;		// this variable only exists in 
				//  the body of the if statement!
         var1 = 20;


     }				// end of var1's scope

     // var1 = 5;			// would be illegal!

  }

  public static double average(double x, double y, double z)
  // the variables x, y, and z are LOCAL variables to this function
  //  NOT the same as the global x.
  {
     double total;		// another LOCAL variable
     total = x + y + z;		// local x being used here
     return (total / 3.0);
  }


}