Activity 2.6 - Experimenting with for loops

Topic

This activity practises using for loops.

Materials

In addition to the discussion of the solution in the Solution document, the project for this activity contains two classes:

• Ex2_6, for which you need to supply additional code;
• Main, which is run to test the code.

Tasks

The class Ex2_6 contains three unfinished methods:

1. countDownFrom(int startingValue), whose purpose is to print out the whole numbers from startingValue down to zero;
2. totalFromOneTo(int finalValue), which adds up all the integers from 1 to finalValue inclusive;
3. howManySquaresUpTo(int limit), which works out how many of the squares of the integers between 1 and limit inclusive are no bigger than limit, and prints the result. (To find the square of a number, multiply it by itself.)

Instructions

Open class Ex2_6 and complete the unfinished methods in turn. Run the project after each modification to test the modifications. You can assume that each method receives a sensible argument. We will discuss how to deal with error conditions in a later unit.

With the test value given the results of the second task should be 5151 and 10