Defining variables
To start, we need to ask ourselves a simple question: what is a variable? Depending on your point of view, there are a few different ways of answering this question (all of which are valid):
- Conceptually, a variable is the most basic unit of programming, as an atom is to the physical world (except in string theory). Everything starts with variables, and programs can’t exist without them.
- Technically, a variable is a tiny section of your computer’s memory that holds an assigned value. Every variable keeps track of where its information is stored (this is called a memory address), its value, and its type (for instance, numbers, words, or lists).
- Practically, a variable is a container. You can create new ones whenever you want, fill them with stuff, move them around, change what they’re holding, and reference them as needed. They can even be empty and still be useful!
You can find an in-depth explanation of variables...
