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# Functional Programming in C++


- **Date:** Friday, Jul 11, 2025
- **Time:** 11:00–11:30 (30 min)
- **Room:** Stage 1
- **Event:** World Congress 2025
- **Tags:** c++, functional programming

## Recording

[Watch recording](https://www.wearedevelopers.com/videos/1409-functional-programming-in-c)

## Description

Functional programming is a declarative way of writing programs by composing functions. In many situations, this can lead to code that is easier to write and understand and less error-prone. However, it requires a shift to a more functional mindset.
This talk gives an introduction to functional programming in C++ using the modern standard library. We will cover algorithms using `std::ranges`, composable error handling with `std::optional` and `std::expected`, algebraic data types, and separating IO from computation. In the end, we'll even cover the M-word.

## Speaker

### [Jonathan Müller](https://www.wearedevelopers.com/@jonathan-muller)

Software Engineer


## Related talks at this congress

- [Data-Oriented Programming - Version 1.1](https://www.wearedevelopers.com/events/world-congress-2025/sessions/700-data-oriented) — Nicolai Parlog
- [Modern Java 25](https://www.wearedevelopers.com/events/world-congress-2025/sessions/562-modern-java-25) — Ron Veen
- [Beyond Files: Reimagining writing code in a distributed AI-powered era](https://www.wearedevelopers.com/events/world-congress-2025/sessions/899-beyond-files) — Brian Graham
- [C# Lowering - What is it and why should I care?](https://www.wearedevelopers.com/events/world-congress-2025/sessions/736-c-lowering-what-is) — Steven Giesel