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C# Basics
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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?

bookString Formatting Practice

Fix the code so that the values are correctly embedded in the output string.

cs

main

copy

              
12345678910111213141516

            
using System;

internal class Program
{
  static void Main(string[] args)
  {
    int num_1 = 10;
    int num_2 = num_1 * 2;
    int num_3 = num_2 * 3;
    int num_4 = num_1 + num_2 + num_3;

    // Change code below this line
    Console.WriteLine("The sum of {num_1}, {num_2} and {num_3} is {num_4}");
    // Change code above this line
  }
}
  1. Look for any missing symbol(s) in the string formatting syntax.
cs

main

copy

              
1234567891011121314151617

            
using System;

internal class Program
{
    static void Main(string[] args)
    {

        int num_1 = 10;
        int num_2 = num_1 * 2;
        int num_3 = num_2 * 3;
        int num_4 = num_1 + num_2 + num_3;

        // Change code below this line
        Console.WriteLine($"The sum of {num_1}, {num_2} and {num_3} is {num_4}");
        // Change code above this line
    }
}

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