Swift Programming: The Big Nerd Ranch Guide, 3rd Edition

Chapter 5. Switch

In Chapter 3, Conditionals, you saw one sort of conditional statement: if/else. Along the way, we mentioned that if/else is not great for scenarios that have more than a few conditions. This chapter looks at the switch statement, which is ideal for handling multiple conditions. As you will see, Swift’s switch statement is a flexible and powerful feature of the language.

if/else statements execute code based on whether the condition under consideration evaluates to true. switch statements consider a particular value and attempt to match it against a number of expressions, called cases. If there is a match, the switch executes the code associated with that case. In this chapter, you will explore the use of switch statements ...