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# Chapter 3.   Data structures

![Data structures](../assets/covers/chapter_data_structure.jpg){ class="cover-image" }

!!! abstract

    Data structures serve as a robust and diverse framework.

    They offer a blueprint for the orderly organization of data, upon which algorithms come to life.

## Chapter Contents

- [3.1   Classification of data structures](https://www.hello-algo.com/en/chapter_data_structure/classification_of_data_structure/)
- [3.2   Fundamental data types](https://www.hello-algo.com/en/chapter_data_structure/basic_data_types/)
- [3.3   Number encoding *](https://www.hello-algo.com/en/chapter_data_structure/number_encoding/)
- [3.4   Character encoding *](https://www.hello-algo.com/en/chapter_data_structure/character_encoding/)
- [3.5   Summary](https://www.hello-algo.com/en/chapter_data_structure/summary/)