> For the complete documentation index, see [llms.txt](https://v-community.gitbook.io/v-by-example/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://v-community.gitbook.io/v-by-example/en/examples/section_4.md).

# section\_4

- [Files](https://v-community.gitbook.io/v-by-example/en/examples/section_4/files.md)
- [JSON](https://v-community.gitbook.io/v-by-example/en/examples/section_4/json.md)
- [Testing](https://v-community.gitbook.io/v-by-example/en/examples/section_4/testing.md)
- [Array Functions](https://v-community.gitbook.io/v-by-example/en/examples/section_4/array-functions.md)