Visual Basic 2005 for Programmers: Deitel Developer Series, Second Edition

5.1. Introduction

In this chapter and the next, we present the theory and principles of structured programming with control statements—important in building and manipulating objects. In this chapter, we introduce Visual Basic’s If...Then, If...Then...Else, While, Do While...Loop and Do Until...Loop control statements, five of the building blocks that allow programmers to specify the logic required for methods to perform their tasks. We devote a portion of the chapter (and Chapters 6 and 8) to further developing the GradeBook class introduced in Chapter 4. In particular, we add a method to the GradeBook class that uses control statements to calculate the average of a set of student grades. Another example demonstrates how to combine control statements ...