How do you add comments in R?

In R, comments are added by placing the # symbol before the comment text. Comments are ignored by the R interpreter and are used to annotate the code, making it easier to understand and maintain.

# This is a single-line comment
x <- 10  # Assigning the value 10 to variable x

# Multi-line comments are just multiple single-line comments
# Comment line 1
# Comment line 2
result <- x * 2  # Multiply x by 2 and store the result

In this example, comments are used to explain the purpose of variables and code sections. R does not have a built-in syntax for multi-line comments, so you simply use multiple # symbols for each line of a comment.

Comments are essential for documenting your code, helping both you and others to understand the logic, decisions, and purpose behind the code. They are especially useful in complex scripts where code readability is critical.