It is very simple to create variables in R, and to save values in them. To create a variable, you simply need to give the variable a name, and assign a value to it.

In many other languages, such as SQL, it's necessary to specify the type of value that the variable will hold. So, for example, if the variable is designed to hold an integer or a string, then this is specified at the point at which the variable is created.

Unlike other programming languages, such as SQL, R does not require that you specify the type of the variable before it is created. Instead, R works out the type for itself, by looking at the data that is assigned to the variable.

In R, we assign variables using an assignment variable, which is a less than sign (<) followed by a hyphen (-). Put together, the assignment variable looks like so:

It is important to understand what is contained in the variables. It is easy to check the content of the variables using the ls command. If you need more details of the variables, then the ls.str command will provide you with more information.

If you need to remove variables, then you can use the rm function.