iterate over an array in R

  for (item in array) {
    # Do something with item
  }

This code will loop through an array (list of elements) called “array”. Within the loop, the individual elements in the array can be accessed one at a time and used in whatever way you need.

The first line of code “for (item in array)”, starts the loop by creating an item to represent each element in the array. The “in array” part tells the loop which array to use.

The code inside the brackets (between the curly braces) is the action that will be applied to each element. This is where you would write code to do something with each item of the array.

Once the code inside the brackets is complete, it will go back to the beginning of the loop, assign the next element of the array to the item variable, and execute the code again for this new element. The loop will continue until it has gone through each element of the array.