manual_teachbooks/book/features/exercise.md

```{attributiongrey} Attribution
:class: attribution
This page reuses MIT licensed content from {cite:t}`sphinx-exercise`. {fa}`quote-left`{ref}`Find out more here.<external_resources>`
```

```{admonition} User types
:class: tip
This section is useful for user type 3-5.
```
+++
{bdg-primary}`Sphinx Extension`
{bdg-link-light}`Included in TeachBooks Template <../external/template/README.html>`
{bdg-link-primary-line}`Included in TeachBooks Favourites <./favourites.html>`

Sphinx exercise

This extensions provides an easy way to add exercises and solutions to your book. It is created by the Executable Books team and is documented here.

TeachBooks has made some small modifications to the original extension, such that it works well with translated books; this modified version is located in the repository github.com/TeachBooks/sphinx-exercise.

What does it do?

This extension defines exercises and solutions as new admonition types:

:label: my-exercise

Recall that $n!$ is read as "$n$ factorial" and defined as
$n! = n \times (n - 1) \times \cdots \times 2 \times 1$.

There are functions to compute this in various modules, but let's
write our own version as an exercise.

In particular, write a function `factorial` such that `factorial(n)` returns $n!$
for any positive integer $n$.

:label: my-solution

Here's one solution.

```{code-block} python
def factorial(n):
    k = 1
    for i in range(n):
        k = k * (i + 1)
    return k

factorial(4)
```

More information can be found in the official documentation.

Installation

To use this extenstion, follow these steps:

Step 1: Install the Package

Install the TeachBooks' version of sphinx-exercise package using pip:

pip install sphinx-exercise @ git+https://github.com/TeachBooks/sphinx-exercise.git

Step 2: Add to requirements.txt

Make sure that the package is included in your project's requirements.txt to track the dependency:

sphinx-exercise @ git+https://github.com/TeachBooks/sphinx-exercise.git

Step 3: Enable in _config.yml

In your _config.yml file, add the extension to the list of Sphinx extra extensions (important: underscore, not dash this time):

sphinx: 
    extra_extensions:
        .
        .
        .
        - sphinx_exercise
        .
        .
        .