Wj 1103a Module 2 Exercise1

Exercise 1: Using the while Loop The objective of this exercise is to write classes that use while loops.

Task 1 – Writing a Class That Uses the while Loop In this task, you write a class that counts from 1 to any number. Follow these steps to write your class: 1. Go to the loops directory. 2. Write a class called Counter that contains a method called displayCount that: • Counts from one (1) to MAX_COUNT, where MAX_COUNT is a variable that you must declare and initialize to any number, by using a while loop • Displays the count 3. Compile your program. 4. Use the CounterTest.class file to test your program.

Task 2 – Writing Another Class That Uses the while Loop In this task, you write a class called Sequence that displays a sequence starting with the numbers 1 and 1. Successive numbers in the sequence are the sum of the previous two numbers. For example: 1 1 2 3 5 8 13 and so on. Follow these steps to create your class: 5. Write a class called Sequence that contains a method called displaySequence. The display method should contain a while loop that: • •

Performs an operation to calculate a number in the sequence. Displays the first 10 numbers in the sequence. The result should look like: 1 1 2 3 5 8 13 21 34 55

6. Compile your program. 7.

Use the SequenceTest.class file to test your program.