Cookbook – SWIFT for Beginners – Chapter 05 : Booleans

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Booleans in Swift programming language are a type of data that can only have two possible values: true or false. This is often referred to as binary data, as there are only two options.

Booleans are commonly used in programming to represent the state of a variable. For example, a variable might be set to true if a user is logged in and false if they are not. This allows for simple checks and decisions to be made in code, such as only showing certain features to a logged in user.

Booleans are also used in comparison operations, such as checking if one number is greater than or equal to another. For example, you can use a boolean to check if a user’s age is greater than or equal to 18, and if so, allow them to access certain content.

In Swift, you can declare a boolean variable just like any other type of variable, by using the “var” keyword followed by the variable name and a colon, and then the type “Bool”. For example:

var isLoggedIn: Bool = false

You can then assign the value of the boolean to either true or false, and change it as needed in your code.

In conclusion, booleans in Swift are an essential part of programming, as they allow for simple decisions to be made based on the state of a variable. Understanding how to work with and manipulate booleans is a crucial skill for any beginner learning Swift programming.

Cookbook – SWIFT for Beginners – Chapter 05 : Booleans

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