Behavior of the program

(Display Listing 3.)

The behavior of this program is the same as the behavior of the program named Alice0175b except:

The values displayed in the bubble shown in Figure 4 are 0.0, 2.0, 4.0, etc. instead of 0.0, 1.0, 2.0, etc.

In other words:

The loop can be made to count by any value you choose, (including fractional and negative values), by changing the specified value in the counter update clause.