R – Loop through items in List
To loop through items in a list in R programming, use For Loop.
In this tutorial, we will learn how to iterate over a list using For Loop, with the help of example programs.
The syntax to use For Loop for a list is
for (item in list) { //code }
We can access ith item inside for-loop, during ith iteration.
Examples
In the following program, we will create a list with some initial values, and iterate over the items of the list using for loop.
example.R
myList <- list("Sunday", "Monday", "Tuesday") for (item in myList) { print(item) }
Output
[1] "Sunday" [1] "Monday" [1] "Tuesday"
Now, let us take a list of numbers, and iterate over them using For Loop.
example.R
myList <- list(1, 4, 9, 16, 25) for (item in myList) { print(item) }
Output
[1] 1 [1] 4 [1] 9 [1] 16 [1] 25
Conclusion
In this R Tutorial, we learned how to iterate over items in a list in R programming using For Loop, with the help of examples.