Programming in Objective-C

5. Program Looping

In objective-C you can repeatedly execute a sequence of code in several ways. These looping capabilities are the subject of this chapter, and they consist of the following:

• The for statement

• The while statement

• The do statement

We'll start with a simple example: counting numbers.

If you were to arrange 15 marbles into the shape of a triangle, you would end up with an arrangement that might look something like this:

The first row of the triangle contains one marble, the second row contains two marbles, and so on. In general, the number of marbles required to form a triangle containing n rows would be the sum of the integers ...