It is ignored, but its useful to remind you whats going on etc. The first bit of real code. We want to find out how many images there are in the splash. Now we could have returned the number of regions instead if we used the code for regions. Some General points.
White space is ignored - layout is only important for clarity.
Capitals have no effect. The text you want to display - in inverted commas. This is known as a string . Complicated, but well worth it as you'll see later. As you might have guessed, this procedure stops the program running.