# Chapter 4 The Basics

## 4.1 R can be our calculator

Addition (use `+`).

``> 2+2``
``[1] 4``

Multiplication (use `*`).

``> 2*6``
``[1] 12``

Division (use `/`).

``> 150/3``
``[1] 50``

…anything is possible

``> ((2+3)*8)/123``
``[1] 0.3252033``

💡 Type in your numbers either within the workshop.R file (TOP-RIGHT) or within the console (BOTTOM-RIGHT). Then to run - click Run at the top of the .R script or type `ctrl/cmd` + `enter`. The answer prints in the console.

## 4.2 R can be our notebook

We can save important information for later.

We can use `<-` or `=`

``````> my_name <- "Caitlin"
> paste("My name is", my_name)``````
``[1] "My name is Caitlin"``
``````> several_names <- c("Caitlin", "Dionne", "Lauren")
> paste("My name is", several_names)``````
``[1] "My name is Caitlin" "My name is Dionne"  "My name is Lauren" ``
``````> a_number <- 137
> another_number <- 120
>
> a_number * another_number``````
``[1] 16440``
``> a_number / another_number``
``[1] 1.141667``
``> (2*a_number) + another_number``
``[1] 394``

💡 Students are encouraged to make their own variable names and get used to R coding symbols