When you start writing programs, you'll quickly find that you need to keep track of different types of information.
This might be the tracking of your clients' names, the amounts of money in your bank accounts, or the ages of your
favorite movie stars. To keep track of this information, your computer programs need a way to store the values. In this sample chapter, you'll learn what a variable is, as well as how to: create variable names in C#, use different types of numeric variables, evaluate the differences and similarities between character and numeric values, and declare and initialize variables.