Well done! Let's consider the integer division. This kind of division, to be honest, is used almost every day, and you may not notice it.

For example, if you have 16 candies and want to share them among your three friends equally. Then, each friend will receive five candies, and there will be one remaining candy (since 16 = 5*3 + 1). In math, we call that the result of **integer division** of `16` by `3` is `5`, and `1` is the **remainder** of this division.

In R, you can perform these operations by using:
- `%/%` - integer division.
- `%%` - the remainder of a division.

The example above can be calculated using R by the following syntax:


# Number of candies for each friend
16 %/% 3
# Number of candies remaining
16 %% 3

In the first section, you will consider the very basics of R - outputting and performing basic operations. You will finish the section with the variables theory.

In the second section, you will learn the vector class in R, which represents single values too. You will consider the main data types for single values and how to work with multiple values of a kind at once.

Factors (or categorical variables) are widely used in real life. These are blood types, currencies, nationalities, brands, etc. Unlike numerical variables, factors are limited to a finite number of values.