It's not hiding, they link to it.
>> You can find the exercises in the companion GitHub repository.
https://github.com/mainmatter/100-exercises-to-learn-rust
And then they tell you to complete the exercises for each section before continuing and tell you exactly where the first exercise is:
> The exercise for this section is located in exercises/01_intro/00_welcome
Read the section titled "Structure" for all of this information.
It's not hiding, they link to it.
>> You can find the exercises in the companion GitHub repository.
https://github.com/mainmatter/100-exercises-to-learn-rust
And then they tell you to complete the exercises for each section before continuing and tell you exactly where the first exercise is:
> The exercise for this section is located in exercises/01_intro/00_welcome
Read the section titled "Structure" for all of this information.