Operators in Python: Arithmetic, Logical, Comparison [2022]

In Python, there are lots of operators. You can use operators to do basic math, comparisons, logical expressions, and more. Operators are an important concept in programming. Here are some examples of using different types of operators in Python: This is a complete guide to operators in Python. The theory is backed up with great …

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Dictionaries

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 …

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Arrays

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 …

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Optionals

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 …

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Class Inheritance

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 …

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Classes

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 …

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