Let's now try and execute the `sum()` and `sqrt()` functions in R. Follow the steps given below:

- Open the R console on your system.
- Type the code as follows:

sum(1, 2, 3, 4, 5)sqrt(144)

- Execute the code.

**Output**: The preceding code provides the following output:

Functions such as `sum()` and `sqrt()` are called **base functions**, which are built into R. This means that they come pre-installed when R is downloaded.

We could build all of our code right in the R console, but eventually, we might want to see our files, a list of everything in our global environment, and more, so instead, we'll use RStudio. Close ...