Functional Programming

Lesson in the iOS Roadmap · Stage 5: Core Programming Concepts

Last updated 14 September 2026

What is Functional Programming?

Functional programming is a style of programming where code is written using pure functions, avoiding changing state and mutable data. It emphasizes the use of mathematical functions to process data, which leads to more predictable and bug-resistant code. This approach helps in writing concise, readable, and testable code.

Study this in the interactive course See the whole iOS roadmap

Free resources to learn Functional Programming

Functional Programming: common questions

Can I learn Functional Programming in Hindi?

This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Functional Programming in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.

Is this Functional Programming tutorial for beginners?

It is lesson 22 of 170 in the free iOS roadmap, in stage 5, Core Programming Concepts. If you are new to iOS, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.