Variables are very important, because, once the data is associated with a variable name, you can use that name to refer to it until it is deleted.
This can be a single number or character string, or, more often, a larger group of data (such as the data structures discussed in the next section). A variable is simply a space in the computer's memory that saves one piece of data.
The following section covers how to import data from a csv file into a variable.
