Appendix A. Fundamental Programming Concepts
The following information is for readers who are new to programming and need a primer on some fundamental programming concepts. If you have programmed in another language, chances are the concepts presented in this appendix are not new to you. You should, however, review the material briefly to become familiar with the C# syntax.
Working with Variables and Data Types
Variables in programming languages store values that can change while the program executes. For example, if you wanted to count the number of times a user tries to log in to an application, you could use a variable to track the number of attempts. The variable is a memory location where the value is stored. Using the variable, your program ...