How to get Length of List in R?

R – List Length

To get length of list in R programming, call length() function and pass the list as argument to length function.

The syntax to call length function with list myList as argument is

length(myList)

The length function returns an integer representing the number of items in the list.

Examples

In the following program, we will create a list containing some string values and find its length programmatically using length() function.

example.R

myList <- list("Sunday", "Monday", "Tuesday", "Wednesday")
listLength = length(myList)
cat("List length is :", listLength)

Output

List length is  4

Now, let us create an empty list and verify if the list’s length is zero or not.

example.R

myList <- list()
listLength = length(myList)
cat("List length is :", listLength)

Output

List length is : 0

Conclusion

In this R Tutorial, we learned how to find the length of a list in R programming using length() function, with the help of examples.