Cookbook – SWIFT for Beginners – Chapter 08 : Enums

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Enums, short for Enumerations, is a data type that is used to define a set of related values in Swift programming language. It is a great tool for organizing and grouping data together.

Think of it like a multiple choice question, where you have a list of options to choose from. This is what enums do, they allow you to define a set of related values in a clean and organized way.

To create an enum in Swift, you use the “enum” keyword followed by the name of the enum and then a set of related values enclosed in curly braces “{}”. For example:

enum Weekdays { 
    case Monday 
    case Tuesday 
    case Wednesday 
    case Thursday 
    case Friday 
    case Saturday 
    case Sunday 
}

In this example, we created an enum named “Weekdays” that has seven values, one for each day of the week.

Once you have defined an enum, you can use its values in your code. For example:

let today = Weekdays.Monday

Here, we created a constant named “today” and set it to “Weekdays.Monday”, which is one of the values of the “Weekdays” enum.

Enums can also have associated values, which means that each value of the enum can have its own unique data associated with it. For example:

enum StudentGrades { 
    case A(Double) 
    case B(Double) 
    case C(Double) 
    case D(Double) 
    case F(Double) 
}

In this example, each value of the “StudentGrades” enum has a Double associated with it. This allows you to store additional information with each value.

Enums are a powerful tool in Swift and can help you organize your data in a clear and concise way. They can also be used in switch statements, which allow you to perform different actions based on the value of an enum.

So, if you’re just starting out with Swift programming or if you’re looking to improve your code organization, enums are a great place to start. Start using enums today and see how they can make your code cleaner, more readable, and more efficient!

Cookbook – SWIFT for Beginners – Chapter 08 : Enums

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