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Introduction to R Syntax
Variables

Now that you know how R classifies some of the basic information types, let’s figure out how to store them. In programming, variables allow us to store information and associate that information with a name. In R, we assign variables by using the assignment operator, an arrow sign (<-) made with a carat and a dash.

full_name <-"Natalia Rodríguez Nuñez"

In the example above, we store the string value “Natalia Rodríguez Nuñez” in a variable called full_name. Variables can’t have spaces or symbols in their names other than an underscore (_). They can’t begin with numbers but they can have numbers after the first letter (e.g., cool_variable_5 is OK).

It’s no coincidence we call these creatures “variables”. If we need to update a variable but perform the same logical process on it, we can change its value! For example, take the variable message_string:

# Greeting message_string <- "Hello there" print(message_string) # Farewell message_string <- "Hasta la vista" print(message_string)

Above, we create the variable message_string, assign a welcome message, and print the greeting. After we greet the user, we want to wish them goodbye. We then update message_string to a departure message and print that out.

Note: You can also use = instead of <- to assign a value but R-tists(R programmers) prefer to do it with an arrow.

Instructions

1.

Create a variable name with your first name as a string.

2.

Create a variable age with your age as a number.

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