2.1. Introduction

In this chapter, we present five examples that demonstrate how your programs can display messages and obtain information from the user for processing. The first three examples display messages on the screen. The next obtains two numbers from a user, calculates their sum and displays the result. The accompanying discussion shows you how to perform various arithmetic calculations and save their results for later use. The fifth example demonstrates decision-making fundamentals by comparing two numbers, then displaying messages based on the comparison results.