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![What is C#? [1 of 19]](https://sec.ch9.ms/ch9/76d1/97c52d0b-aa31-4f79-a941-3e225b2276d1/CSharp101WhatIsCSharp_512.jpg)
What is C#? [1 of 19]
What is C#? It's a powerful and widely used programming language that you can use to make websites, games, mobile apps, desktop apps and more with .NET. Learn C#, get started, and it'll give you the…
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C#: Hello World [2 of 19]
![C#: Hello World [2 of 19]](https://sec.ch9.ms/ch9/3419/c9e2db17-553e-4ea0-8010-19c53c813419/CSharp101HelloWorld_512.jpg)
C#: The Basics of Strings [3 of 19]
![C#: The Basics of Strings [3 of 19]](https://sec.ch9.ms/ch9/019c/6e81fb17-6d0e-4009-afa2-d4e264fc019c/CSharp101BasicsOfStrings_512.jpg)
C#: Searching Strings [4 of 19]
![C#: Searching Strings [4 of 19]](https://sec.ch9.ms/ch9/ca98/5922f8c7-163e-4efa-8224-f426ba9bca98/CSharp101SearchingStrings_512.jpg)
C#: Numbers and Integer Math [5 of 19]
![C#: Numbers and Integer Math [5 of 19]](https://sec.ch9.ms/ch9/2442/8d35226a-723f-4aa5-bd7b-44e250662442/CSharp101NumbersIntegerMath_512.jpg)
C#: Numbers and Integer Precision [6 of 19]
![C#: Numbers and Integer Precision [6 of 19]](https://sec.ch9.ms/ch9/d87c/03b6268e-39e6-4b51-88ef-b82c77c6d87c/CSharp101NumbersIntegerPrecision_512.jpg)
C#: Numbers and Decimals [7 of 19]
![C#: Numbers and Decimals [7 of 19]](https://sec.ch9.ms/ch9/b970/3de69ea2-4b1d-46f0-b7b5-d38c18d8b970/CSharpNumbersDecimals_512.jpg)
C#: Branches (if) [8 of 19]
![C#: Branches (if) [8 of 19]](https://sec.ch9.ms/ch9/1273/14209d41-ee88-4378-b73c-4a939c441273/CSharp101Branchesif_512.jpg)
C#: "Hello World" Explained [9 of 19]
![C#: "Hello World" Explained [9 of 19]](https://sec.ch9.ms/ch9/ab84/db4745b9-23db-45d1-a37c-6922ba79ab84/CSharp101HelloWorldExplained_512.jpg)
C#: What are Loops? [10 of 19]
![C#: What are Loops? [10 of 19]](https://sec.ch9.ms/ch9/edc4/c066c775-ce18-45b1-bd8e-036bab9fedc4/CSharp101WhatAreLoops_512.jpg)
C#: Combining Branches and Loops [11 of 19]
![C#: Combining Branches and Loops [11 of 19]](https://sec.ch9.ms/ch9/a264/b6de7783-3060-44a1-9e2b-d3d9f9b8a264/CSharp101CombiningBranchesLoops_512.jpg)
C#: Arrays, List, and Collections [12 of 19]
![C#: Arrays, List, and Collections [12 of 19]](https://sec.ch9.ms/ch9/a802/1728f900-256e-4ea3-9f77-2f442c87a802/CSharp101ArraysListCollections_512.jpg)
C#: Sort, Search, and Index Lists [13 of 19]
![C#: Sort, Search, and Index Lists [13 of 19]](https://sec.ch9.ms/ch9/9d41/50b6b0d7-8763-41d3-a04f-3682506b9d41/CSharp101SortSearchIndexLists_512.jpg)