> For the complete documentation index, see [llms.txt](https://pankhaniyajay.gitbook.io/csharp-30-days-of-code/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pankhaniyajay.gitbook.io/csharp-30-days-of-code/master.md). # Initial ## [30 Days of Code](https://www.hackerrank.com/domains/tutorials/30-days-of-code) | Day | Problem | C Programming | CPP | C# | | ------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- | | [Day 0](/csharp-30-days-of-code/day-0-hello-world.md) | [Hello World](https://www.hackerrank.com/challenges/30-hello-world/problem) | [Solution in C](/csharp-30-days-of-code/day-0-hello-world/c.md) | [Solution in CPP](/csharp-30-days-of-code/day-0-hello-world/cpp.md) | [Solution in C-Sharp](/csharp-30-days-of-code/day-0-hello-world/c-1.md) | | [Day 1](/csharp-30-days-of-code/day-1-data-type.md) | [Data Type](https://www.hackerrank.com/challenges/30-data-types/problem) | [Solution in C](/csharp-30-days-of-code/day-1-data-type/c.md) | [Solution in CPP](/csharp-30-days-of-code/day-1-data-type/cpp.md) | [Solution in C-Sharp](/csharp-30-days-of-code/day-1-data-type/c-1.md) | | [Day 2](/csharp-30-days-of-code/day-2-operators.md) | [Operators](https://www.hackerrank.com/challenges/30-operators/problem) | [Solution in C](/csharp-30-days-of-code/day-2-operators/c.md) | [Solution in CPP](/csharp-30-days-of-code/day-2-operators/cpp.md) | [Solution in C-Sharp](/csharp-30-days-of-code/day-2-operators/c-1.md) | | [Day 3](/csharp-30-days-of-code/day-3-intro-to-conditional-statements.md) | [Intro to Co..](https://www.hackerrank.com/challenges/30-conditional-statements/problem) | [Solution in C](/csharp-30-days-of-code/day-3-intro-to-conditional-statements/intro-to-conditional-statements-solution-in-c-programming.md) | [Solution in CPP](/csharp-30-days-of-code/day-3-intro-to-conditional-statements/intro-to-conditional-statements-solution-in-cpp.md) | [Solution in C-Sharp](/csharp-30-days-of-code/day-3-intro-to-conditional-statements/intro-to-conditional-statements-solution-in-c.md) | | [Day 4](/csharp-30-days-of-code/day-4-class-vs.-instance.md) | [Class vs. i..](https://www.hackerrank.com/challenges/30-class-vs-instance/problem) | ~~Solution in C~~ | [Solution in CPP](/csharp-30-days-of-code/day-4-class-vs.-instance/class-vs.-instance-solution-in-cpp.md) | [Solution in C-Sharp](/csharp-30-days-of-code/day-4-class-vs.-instance/class-vs.-instance-solution-in-c.md) | | [Day 5](/csharp-30-days-of-code/day-5-loops.md) | [Loops](https://www.hackerrank.com/challenges/30-loops/problem) | [Solution in C](/csharp-30-days-of-code/day-5-loops/loops-solution-in-c-programming.md) | [Solution in CPP](/csharp-30-days-of-code/day-5-loops/loops-solution-in-cpp.md) | [Solution in C-Sharp](/csharp-30-days-of-code/day-5-loops/loops-solution-in-c.md) | | [Day 6](/csharp-30-days-of-code/day-6-lets-review.md) | [Let's Review](https://www.hackerrank.com/challenges/30-review-loop/problem) | [Solution in C](/csharp-30-days-of-code/day-6-lets-review/lets-review-solution-in-c-programming.md) | [Solution in CPP](/csharp-30-days-of-code/day-6-lets-review/lets-review-solution-in-cpp.md) | [Solution in C-Sharp](/csharp-30-days-of-code/day-6-lets-review/lets-review-solution-in-c.md) | | [Day 7](/csharp-30-days-of-code/day-7-arrays.md) | [Arrays](https://www.hackerrank.com/challenges/30-arrays/problem) | [Solution in C](/csharp-30-days-of-code/day-7-arrays/arrays-solution-in-c-programming.md) | [Solution in CPP](/csharp-30-days-of-code/day-7-arrays/arrays-solution-in-cpp.md) | [Solution in C-Sharp](/csharp-30-days-of-code/day-7-arrays/arrays-solution-in-c.md) | | [Day 8](/csharp-30-days-of-code/day-8-dictionaries-and-maps.md) | [Dictionaries...](https://www.hackerrank.com/challenges/30-dictionaries-and-maps/problem) | ~~Solution in C~~ | [Solution in CPP](/csharp-30-days-of-code/day-8-dictionaries-and-maps/dictionaries-and-maps-solution-in-cpp.md) | [Solution in C-Sharp](/csharp-30-days-of-code/day-8-dictionaries-and-maps/dictionaries-and-maps-solution-in-c.md) | | [Day 9](/csharp-30-days-of-code/day-9-recursion-3.md) | [Recursion 3](https://www.hackerrank.com/challenges/30-recursion/problem) | [Solution in C](/csharp-30-days-of-code/day-9-recursion-3/recursion-3-solution-in-c-programming.md) | [Solution in CPP](/csharp-30-days-of-code/day-9-recursion-3/recursion-3-solution-in-cpp.md) | [Solution in C-Sharp](/csharp-30-days-of-code/day-9-recursion-3/recursion-3-solution-in-c.md) | | [Day 10](/csharp-30-days-of-code/day-10-binary-numbers.md) | [Binary Number](https://www.hackerrank.com/challenges/30-binary-numbers/problem) | [Solution in C](/csharp-30-days-of-code/day-10-binary-numbers/binary-numbers-solution-in-c-programming.md) | [Solution in CPP](/csharp-30-days-of-code/day-10-binary-numbers/binary-numbers-solution-in-cpp.md) | [Solution in C-Sharp](/csharp-30-days-of-code/day-10-binary-numbers/binary-numbers-solution-in-c.md) | | [Day 11](/csharp-30-days-of-code/day-11-2d-arrays.md) | [2D Arrays](https://www.hackerrank.com/challenges/30-2d-arrays/problem) | ~~Solution in C~~ | ~~Solution in CPP~~ | [Solution in C-Sharp](/csharp-30-days-of-code/day-11-2d-arrays/2d-arrays-solution-in-c.md) | | [Day 12](/csharp-30-days-of-code/day-12-inheritance.md) | [Inheritance](https://www.hackerrank.com/challenges/30-inheritance/problem) | ~~Solution in C~~ | ~~Solution in CPP~~ | [Solution in C-Sharp](/csharp-30-days-of-code/day-12-inheritance/inheritance-solution-in-c.md) | | [Day 13](/csharp-30-days-of-code/day-13-abstract-classes.md) | [Abstract Classes](https://www.hackerrank.com/challenges/30-abstract-classes/problem) | ~~Solution in C~~ | ~~Solution in CPP~~ | [Solution in C-Sharp](/csharp-30-days-of-code/day-13-abstract-classes/abstract-classes-solution-in-c.md) | | [Day 14](/csharp-30-days-of-code/day-14-scope.md) | [Scope](https://www.hackerrank.com/challenges/30-scope/problem) | ~~Solution in C~~ | ~~Solution in CPP~~ | [Solution in C-Sharp](/csharp-30-days-of-code/day-14-scope/scope-solution-in-c.md) | | [Day 15](/csharp-30-days-of-code/day-15-linked-list.md) | [Linked List](https://www.hackerrank.com/challenges/30-linked-list/problem) | ~~Solution in C~~ | ~~Solution in CPP~~ | [Solution in C-Sharp](/csharp-30-days-of-code/day-15-linked-list/linked-list-solution-in-c.md) | | [Day 16](/csharp-30-days-of-code/day-16-exceptions.md) | [Exception](https://www.hackerrank.com/challenges/30-exceptions-string-to-integer/problem) | ~~Solution in C~~ | ~~Solution in CPP~~ | [Solution in C-Sharp](/csharp-30-days-of-code/day-16-exceptions/exceptions-solution-in-c.md) |