> For the complete documentation index, see [llms.txt](https://fundamentals.rocketacademy.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://fundamentals.rocketacademy.co/5-managing-state-and-input-validation.md).

# 5: Managing State and Input Validation

- [5.1: Program Lifecycle and State](https://fundamentals.rocketacademy.co/5-managing-state-and-input-validation/5.1-program-lifecycle-and-state.md)
- [5.2: Program State for Game Modes](https://fundamentals.rocketacademy.co/5-managing-state-and-input-validation/5.2-program-state-for-game-modes.md)
- [Additional Resources 5](https://fundamentals.rocketacademy.co/5-managing-state-and-input-validation/additional-resources-5.md): For the curious and the hungry