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Elixir is a functional programming language that runs in the Erlang VM, a powerful environment to run distributed systems. This course uses Elixir because of its fun syntax, vibrant community, and production-ready tooling. Elixir syntax lets you focus on what’s important while learning functional programming.

Starting from scratch, you will learn the fundamentals of Elixir including expressions, modules, conditional statements, and recursion. Towards the end of the course, you will focus on more advanced material like higher-order functions, how to handle impure functions, and lastly how to design an application using Elixir and functional programming principles.

By the end, you will be able to write basic Elixir programs that follow the functional programming paradigm.

Learn Functional Programming with Elixir

They always return consistent output when given the same input.

They sometimes produce effects beyond the function's scope.

They can sometimes generate unpredictable errors.

Which of the following statements about pure functions is **correct**?

Which of the following statements about pure functions is correct?

They may not return consistent results when given the same inputs.

They interact with content outside of the program context.

A function is impure when it references values that aren’t in the function arguments.

Which of the following statements about impure functions is **incorrect**?

Which of the following statements about impure functions is incorrect?

Which of the following is **not** used to handle impure function results?

Which of the following is not used to handle impure function results?

It is a data structure that helps you combine functions that can result in an error.

It helps you reduce conditional codes when functions can have unexpected results.

It is used to combine functions with predictable outputs.

It is used when your codebase is filled with situations where you must put many functions in sequence and some of them can fail.

Which of the following statements about the error monad is **incorrect**?

Which of the following statements about the error monad is incorrect?

It permits you to combine multiple matching clauses.

If clauses do not match, the code executes and returns the `do` block result.

You should use `with` only when you have function pipelines that cannot result in an error. 

Pattern matching clauses cannot be used inside the `with` block.

Which of the following statements about Elixir's `with` is **correct**?

Which of the following statements about Elixir’s <code>with</code> is correct?

Getting Started

Introduction to Functional Programming

Working with Variables and Functions

Using Pattern Matching to Control Program Flow

Diving into Recursion

Using Higher-Order Functions

Designing Your Elixir Applications

Handling Impure Functions

Conclusion

Appendices

Quiz