Lesson 15 - Enums and custom errors in Swift
In the previous lesson, Handling errors in Swift, we learned how to use methods which can
raise an Error. There are several variants of
try-catch blocks to do this.
In today's Swift tutorial, we're going to explain enumerated types, enums,
and how to define our own error states - own Errors.
Enums
It's nothing complicated. Enums represent a list of possible values of a
variable. It's useful, especially when storing an object's state which can be
one of only a few values. If we stored the individual values as
Strings, nobody could guarantee they only contain the defined
values and we could make a mistake. We can only store one of the
predefined values to an enum type variable.
Days of the week are a typical example of enum usage, just as
well as e.g.
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In this Swift tutorial, we'll learn to use enums, the enumerated types. It'll be followed by creating and handling custom Errors.
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