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C# Basics
course content

Course Content

C# Basics

C# Basics

1. Getting Started
Why C#?C# SyntaxDisplaying OutputChallenge: Outputting a TriangleCommentsChallenge: CommentsVariablesIdentifiersChallenge: Variable DeclarationBasic Operators & ExpressionsChallenge: Operators
2. Dealing with Data Types
Integer Data TypesDeclaring Explicitly Typed VariablesFloating-Point and DoubleBooleansCharacterStringStrings ChallengeBasic String FormattingString Formatting PracticeDeclaring ConstantsBasic Type CastingType Casting PracticeBasic Type ConversionBasic Coding Practice
3. Control Structures
Comparison OperatorsLogical OperatorsOperators ChallengeOrder of Operationsif statementif-condition Challengeelse Keywordelse Keyword Practiceif-else ChainTask (if, else-if, else)switch StatementPracticing Switch
4. Loops
For LoopPracticing For LoopWhile LoopDo-While LoopPracticing Do-While Loopbreak statementcontinue statementPracticing break and continue
5. Arrays
What are Arrays?Practicing Array DeclarationIndexingIndexing PracticeMulti-Dimensional ArraysPracticing Multi-Dimensional ArraysLooping through ArraysArray Loops Challenge
6. Methods
What are Methods?Creating and Calling MethodsMethods Creation PracticeMethod ParametersPracticing Method with ParametersMethod Return ValuesPracticing Return ValuesLocal & Global ScopesPracticing ScopesWhat's Next?

bookComments

In programming, comments are parts of code that are meant for leaving messages, notes or perhaps comments, in the code, for yourself or for other people who might read it. A comment does not affect the functionality of the program.

A Single-Line Comment can be added using the double forward slash (//) operator:

cs

main

copy

              
1234567891011

            
namespace TestConsoleApp
{
    internal class Program
    {
        static void Main(string[] args)
        {   
            // This is a comment
            System.Console.WriteLine("Hello World");
        }
    }
}

A Multi-Line Comment can be added by enclosing the text inside /* and */ operators.

cs

main

copy

              
1234567891011121314151617

            
namespace TestConsoleApp
{
    internal class Program
    {
        static void Main(string[] args)
        {   
            /*
                This
                is
                a
                multi-line
                comment
            */
            System.Console.WriteLine("Hello World");
        }
    }
}

Multi-Line comments can also be used to comment out parts of a single line. For-example:

cs

main

copy

              
1234567891011

            
namespace ConsoleApp
{
    internal class Program
    {
        static void Main(string[] args)
        {
            System.Console.WriteLine(/*" This text will not be shown." */ "This text will be shown. ");
            /* System.Console.WriteLine("The whole statement is commented out"); */
        }
    }
}

It is also a common practice to comment-out a piece of code which we temporarily want to exclude from the program:

cs

main

copy

              
12345678910111213

            
namespace TestConsoleApp
{
    internal class Program
    {
        static void Main(string[] args)
        {   
            System.Console.WriteLine("Line 1");
            System.Console.WriteLine("Line 2");
            // System.Console.WriteLine("Line 3");
            System.Console.WriteLine("Line 4");
        }
    }
}
What lines will be included in the output of the following program?

What lines will be included in the output of the following program?

Select a few correct answers

Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 1. Chapter 5
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