title: What does R.drawable.image return?
body: <pre><code>public class MainActivity extends AppCompatActivity {
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          final ImageView ballDisplay = (ImageView)findViewById(R.id.image_eightBall);
  
          final int[] ballArray = {R.drawable.ball1,
                  R.drawable.ball2,
                  R.drawable.ball3,
                  R.drawable.ball4,
                  R.drawable.ball5};//*******What integer is that???????????
  
          Button myButon = (Button)findViewById(R.id.askButton);
          myButon.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v) {
                  Random randomNumberGenerator = new Random();
                  int number = randomNumberGenerator.nextInt(5);
                  ballDisplay.setImageResource(ballArray[number]);
              }
          });
      }
  }
  </code></pre>
  
  <p><strong>What is the value stored in that intger?</strong></p>