In Python, you can store values to variables. The value of a variable can then be changed throughout the execution of the program. For example, let’s create a bunch of variables: Why variables? As you can imagine, storing data is essential to a computer program. For instance, a typical game application keeps track of some […]
Variables in Python: A Complete Guide (Updated 2022) Read More »
Python is a flexible general-purpose programming language that is easy to learn. Furthermore, Python is relevant in almost all fields of technology and software development. You can practically build any type of software with Python. Python has been around for 30+ years and it has gained massive popularity. But how far is it going? Is
Is It Worth Learning Python? 8 Reasons to Learn [in 2023] Read More »
In Swift, a dictionary is a container for storing key-value pairs. In layman’s terms, you can use a dictionary to store unique items that are related to some values. For instance, let’s create a dictionary that maps a student ID to the name of the student: In this chapter, you learn how to use dictionaries
Swift arrays are a very common data type used to organize your app’s data. You can store multiple elements into an array, such as integers or strings. For example, here is an array of numbers: With arrays, you can do a lot of useful tasks, such as add, remove, or update the elements. You can
In Swift, you can use optionals to represent variables and constants that could be nil or a value. Any data type in Swift can be made optional by adding a question mark after the data type name. For instance, let’s create an optional String: The value of this string is now nil. To use an
In Swift, you can use class inheritance to introduce a parent-child hierarchy to your program. The idea is that the inherited child class has all the properties and attributes of the parent class. As an example: Output: Inheritance is a feature that only classes have in Swift. For example, you cannot inherit a struct. In
In Swift, a class acts as a blueprint for creating objects. For example, here is a class that represents a person: And here you create a Person object: In this guide, you learn how to create objects using classes in Swift. Also, you are going to learn what is the distinction between a struct and
In the previous chapters, you have worked with data types like Int, String, Double. But did you know you can also implement your own custom data type? In Swift, one way to do this is by using a struct. For example: Output: In this chapter, you are going to learn how to create your own
In Swift, a function is a reusable block of code with a name. This function can then be called to perform a specific task with different inputs. When you call a function, you execute the code inside that function. To create a function, you need to: For example, let’s create a function that greets a
In Swift, you can use a while loop to repeat actions as long as a condition is true. For example, let’s use a while loop to calculate the sum from 0 to 10: Output: Here the loop stops only after the value of i is greater than 10. In this guide, you learn how to
