The stack is an area of memory that is used to store values which will eventually be discarded.
11.1 Imagining the Stack
To understand what the stack is or why it is needed, imagine yourself doing a complicated task that involves a lot of paperwork. Imagine yourself doing taxes, and imagine doing it largely on paper, not the computer.
Now, while doing your taxes, you discover that you need to find out how much money you spent on tools for your job. This is a new (though related) task. You have to set down ...
