How to check if a List is Not Empty in R - Step by Step Examples

How to check if a List is Not Empty in R ?

To check if a list is not empty in R, you can use the length() function to check if the length of the list is greater than zero.

In this example,

We create a list named my_list with some elements.
We use an if statement to check if the length of my_list is greater than zero using the length() function.
If the list is not empty, the code inside the if block is executed.
We print a message indicating that the list is not empty.

my_list <- list(1, 2, 3)

if (length(my_list) > 0) {
    print('The list is not empty')
} else {
    print('The list is empty')
}

[1] "The list is not empty"

In this example,

We create a list named empty_list without any elements.
We use an if statement to check if the length of empty_list is greater than zero using the length() function.
Since the list is empty, the code inside the else block is executed.
We print a message indicating that the list is empty.

empty_list <- list()

if (length(empty_list) > 0) {
    print('The list is not empty')
} else {
    print('The list is empty')
}

[1] "The list is empty"

In this tutorial, we learned How to check if a List is Not Empty in R language with well detailed examples.