Variables are containers for storing data values. R does not have a command for declaring a variable. A variable is created the moment you first assign a value to it. To assign a value to a variable, use the <- sign. To output (or print) the variable value, just type the variable name: Example name <- "John" age <- 40 name # output "John" age # output 40 Try it Yourself » From the example above, name and age are variables, while "John" and 5 are values. In other programming language, it is common to use = as an assignment operator. In R, we can use both = and <- as assignment operators. However, <- is preferred in most cases because the = operator can be forbidden in some context in R. Print / Output Variables Compared to many other progamming languages, you do not have to use a function to print/outp...
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