Hour 14. Making Decisions in C Code

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Hour 14. Making Decisions in C# Code

In Hour 11, "Creating and Calling Methods," you learned how to separate code into multiple methods to be called in any order required. But if you had to separate each small code routine into its own method, your projects would quickly become unmanageable. Instead of creating numerous methods , you can use decision-making techniques to execute or omit specific lines of code within a single method. Decision-making constructs or coding structures allow you to execute (or omit) code based on the current situation, such as the value of a variable. C# includes two constructs that allow you to make any type of branching decision you can think of: if else and switch.

In this hour, you'll learn how to use the decision constructs provided by C# to perform robust yet efficient decisions in C# code. In addition, you'll learn how to use the goto statement to redirect code. You'll probably create decision constructs in every application you build, so the quicker you master these skills, the easier it will be to create robust applications.

The highlights of this hour include the following:

• Making decisions using if statements

• Expanding the capability of if statements using else

• Evaluating an expression for multiple values using the switch statement

• Redirecting code flow using goto

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