Execution of the for statement commences by setting the value of the variable n to 1. As mentioned earlier, the program statement immediately following the for statement constitutes the body of the program loop. But what happens if you want to repetitively execute not just a
single program statement, but a group of program statements? You can do so by enclosing all such program statements within a pair of braces. The system then treats this group, or block, of statements as a single entity. In general, any place in a Objective-C program that a single state-ment is