How to assign a value to a variable in R?

Using the assignment operator <-, e.g., my_var <- 1—the most common way of assigning a value to a variable in R.
Using the equal operator =, e.g., my_var = 1—for assigning values to arguments inside a function definition.
Using the rightward assignment operator ->, e.g., my_var -> 1—can be used in pipes.
Using the global assignment operators, either leftward (<<-) or rightward (->>), e.g., my_var <<- 1—for creating a global variable inside a function definition.