Book Image

Learning C# by Developing Games with Unity 2020 - Fifth Edition

By : Harrison Ferrone
Book Image

Learning C# by Developing Games with Unity 2020 - Fifth Edition

By: Harrison Ferrone

Overview of this book

Over the years, the Learning C# by Developing Games with Unity series has established itself as a popular choice for getting up to speed with C#, a powerful and versatile programming language that can be applied in a wide array of application areas. This book presents a clear path for learning C# programming from the ground up without complex jargon or unclear programming logic, all while building a simple game with Unity. This fifth edition has been updated to introduce modern C# features with the latest version of the Unity game engine, and a new chapter has been added on intermediate collection types. Starting with the basics of software programming and the C# language, you’ll learn the core concepts of programming in C#, including variables, classes, and object-oriented programming. Once you’ve got to grips with C# programming, you’ll enter the world of Unity game development and discover how you can create C# scripts for simple game mechanics. Throughout the book, you’ll gain hands-on experience with programming best practices to help you take your Unity and C# skills to the next level. By the end of this book, you’ll be able to leverage the C# language to build your own real-world Unity game development projects.
Table of Contents (16 chapters)

Ref parameters

When we talked about classes and structs back in Chapter 5, Working with Classes, Structs, and OOP, we discovered that not all objects are passed the same way: value types are passed by copy, while reference types are passed by reference. However, we didn't go over how objects, or values, are used when they're passed into methods as parameter arguments. 

By default, all arguments are passed by value, meaning that a variable passed into a method will not be affected by any changes that are made to its value inside the method body. While this works for most cases, there are situations where you'll want to pass in a method argument by reference; prefixing a parameter declaration with either the ref or out keyword will mark the argument as a reference. 

Here are a few key points to keep in mind about using the ref keyword:

  • Arguments have to be initialized before being passed into a method.
  • You don't need to initialize or assign the reference parameter...