C# 10.0 All-in-One For Dummies

Look sharp--learn or refresh your C# skills with the latest version

C# is one of the most popular programming languages, and frequent updates help it keep pace as the world of coding changes. You can keep pace too, thanks to C# 10.0 All-in-One For Dummies, where you'll learn the basics of the language itself, how to code in Visual Studio, and how to take advantage of the new features in the latest release. At every stage of your career, you'll need to know the cutting-edge trends and techniques that clients want. This book has your back, with info on object-oriented programming, writing secure code, building web applications, and more.

The six standalone mini-books you'll find inside this all-in-one will take you through the changes to C# and the practical applications and dev tools that you need to know. New features covered include records, init only setters, top-level statements, pattern matching enhancements, fit and finish features, and a lot more. Plus, this version is packed with more examples and code snippets, so you can sharply see C# in action!

• Learn the very basics of C# programming, even if you have no prior experience
• Refresh your knowledge of the language and learn how to use the new features in the 10.0 version release
• Read six mini-books on hot coding topics like object-oriented programming, Visual Studio, and Windows 10 development
• Enhance your employability and join the 6.5-million-strong community of C# developers

You need an easy-to-read C# guide that will help you understand the incoming updates, and this For Dummies reference is it.

Auteur

John Paul Mueller is an author and technical editor with experience in application development, database management, machine learning, and deep learning. He has written hundreds of books and articles helping everyday people learn everything from networking to database management.

Texte du rabat

Look sharp--learn or refresh your C# skills with the latest version C# is one of the most popular programming languages, and frequent updates help it keep pace as the world of coding changes. You can keep pace too, thanks to C# 10.0 All-in-One For Dummies, where you'll learn the basics of the language itself, how to code in Visual Studio, and how to take advantage of the new features in the latest release. At every stage of your career, you'll need to know the cutting-edge trends and techniques that clients want. This book has your back, with info on object-oriented programming, writing secure code, building web applications, and more. The six standalone mini-books you'll find inside this all-in-one will take you through the changes to C# and the practical applications and dev tools that you need to know. New features covered include records, init only setters, top-level statements, pattern matching enhancements, fit and finish features, and a lot more. Plus, this version is packed with more examples and code snippets, so you can sharply see C# in action! Learn the very basics of C# programming, even if you have no prior experience Refresh your knowledge of the language and learn how to use the new features in the 10.0 version release Read six mini-books on hot coding topics like object-oriented programming, Visual Studio, and Windows 10 development Enhance your employability and join the 6.5-million-strong community of C# developers You need an easy-to-read C# guide that will help you understand the incoming updates, and this For Dummies reference is it.

Contenu

Introduction 1

About This Book 1

Foolish Assumptions 2

Icons Used in This Book 3

Beyond the Book 3

Where to Go from Here 4

Book 1: The Basics of C# Programming 5

Chapter 1: Creating Your First C# Console Application 7

Getting a Handle on Computer Languages, C#, and NET 8

What's a program? 8

What's C#? 9

What's NET? 9

What is Visual Studio 2022? 10

Creating Your First Console Application 11

Creating the source program 11

Taking it out for a test drive 17

Making Your Console App Do Something 17

Reviewing Your Console Application 18

The program framework 19

Comments 19

The meat of the program 19

Replacing All that Ceremonial Code: Top-Level Statements 20

Introducing the Toolbox Trick 21

Saving code in the Toolbox 22

Reusing code from the Toolbox 22

Interacting with C# Online 23

Working with Jupyter Notebook: The Short Version 23

Chapter 2: Living with Variability - Declaring Value-Type Variables 25

Declaring a Variable 26

What's an int? 27

Rules for declaring variables 28

Variations on a theme: Different types of int 28

Representing Fractions 30

Handling Floating-Point Variables 31

Declaring a floating-point variable 31

Examining some limitations of floating-point variables 32

Using the Decimal Type: Is It an Integer or a Float? 34

Declaring a decimal 35

Comparing decimals, integers, and floating-point types 35

Examining the bool Type: Is It Logical? 36

Checking Out Character Types 36

The char variable type 36

Special chars 37

The string type 37

What's a Value Type? 39

Comparing string and char 40

Calculating Leap Years: DateTime 41

Declaring Numeric Constants 43

Changing Types: The Cast 44

Letting the C# Compiler Infer Data Types 46

Chapter 3: Pulling Strings 49

The Union Is Indivisible, and So Are Strings 50

Performing Common Operations on a String 51

Comparing Strings 52

Equality for all strings: The Compare() method 52

Would you like your compares with or without case? 56

What If I Want to Switch Case? 56

Distinguishing between all-uppercase and all-lowercase strings 56

Converting a string to upper- or lowercase 57

Looping through a String 58

Searching Strings 59

Can I find it? 59

Is my string empty? 60

Using advanced pattern matching 60

Getting Input from Users in Console Applications 61

Trimming excess white space 62

Parsing numeric input 62

Handling a series of numbers 64

Joining an array of strings into one string 66

Controlling Output Manually 67

Using the Trim() and Pad() methods 67

Using the Concatenate() method 69

Go Ahead and Split() that concatenate program 71

Formatting Your Strings Precisely 72

Using the String.Format() method 72

Using the interpolation method 77

StringBuilder: Manipulating Strings More Efficiently 77

Chapter 4: Smooth Operators 81

Performing Arithmetic 81

Simple operators 82

Operating orders 82

The assignment operator 84

The increment operator 84

Performing Logical Comparisons - Is That Logical? 85

Comparing floating-point numbers: Is your float bigger than mine? 86

Compounding the confusion with compound logical operations 87

Matching Expression Types at TrackDownAMate.com 89

Calculating the type of an operation 89

Assigning types 91

Changing how an operator works: Operator overloading 92

Chapter 5: Getting into the Program Flow 95

Branching Out with if and switch 96

Introducing the if statement 97

Examining the else statement 100

Avoiding even the else 101

Nesting if statements 102

Running the switchboard 104

Here We Go Loop-the-Loop 110

Looping for a while 111

Doing the do while loop 114

Breaking up is easy to do 115

Looping until you get it right 116

Focusing on scope rules 120

Looping a Specified Number of Times with for 120

A for loop example 121

Why do you need another loop? 122

Nesting loops 123

Chapter 6: Lining Up Your Ducks with Collections 125

The C# Array 126

The argument for the array 126

The fixed-value array 127

The variable-length array 129

Initializing an array 132

Processing Arrays by Using foreach 133

Working with foreach loops in a standard way 133

Relying on GetEnumerator support 134

Sorting Arrays of Data 136 …