C# 6 for Programmers

C# 6 for Programmers

Bibliography

• Author: Paul Deitel
• Full_Title: C# 6 for Programmers
• Category: books
• Last Highlighted Date: 2024-02-08 16:55:58.855429+00:00

Highlights

• Line 1 begins with //, indicating that the remainder of the line is a comment. We begin every source-code file with a comment indicating the figure number and the name of the file in which the code is stored.
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• using System; is a using directive that tells the compiler where to look for a class that’s used in this app. A great strength of Visual C# is its rich set of predefined classes that you can reuse rather than “reinventing the wheel.” These classes are organized under namespaces—named collections of related classes.
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• Whitespace is ignored by the compiler.
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• class Welcome1 begins a class declaration for the class named Welcome1. Every app consists of at least one class declaration that’s defined by you. These are known as user-defined classes.
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• By convention, all class names begin with a capital letter and capitalize the first letter of each word they include (e.g., SampleClassName).
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• C# is case sensitive
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• A class declaration’s file name is usually the class name followed by the .cs file-name extension
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• By convention, a file that contains a single class should have a name that’s identical to the class name
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• A left brace, { (in line 6 in Fig. 3.1), begins each class declaration’s body. A corresponding right brace, }
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• static void Main() is where the app begins execution—this is known as the entry point. The parentheses after the identifier Main indicate that it’s a method. Class declarations normally contain one or more methods.
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• The left brace in line 9 begins the body of the method declaration. A corresponding right brace ends the body (line 11). Line 10 in the method body is indented between the braces
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• Console.WriteLine(“Welcome to C# Programming!”); instructs the computer to perform an action—namely, to display the string of characters between the double quotation marks, which delimit the string.
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• The entire line 10, including Console.WriteLine, the parentheses, the argument "Welcome to C# Programming!" in the parentheses and the semicolon (;), is called a statement. Most statements end with a semicolon.
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• By convention, variable-name identifiers begin with a lowercase letter, and every word in the name after the first word begins with a capital letter (e.g., firstNumber). This naming convention is known as camel case.
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• C# also offers a technology called exception handling that will help you make your apps more robust by enabling them to handle exceptions and continue executing.
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