Iterate with index in R

In R, you can iterate over an array with index using a for loop. Here's an example:

my_array <- c(2, 4, 6, 8, 10)
for(i in 1:length(my_array)) {

  print(paste("Element", i, "is", my_array[i]))

}

Output:

[1] "Element 1 is 2"

[1] "Element 2 is 4"

[1] "Element 3 is 6"

[1] "Element 4 is 8"

[1] "Element 5 is 10"

In this example, we use the length() function to obtain the length of the array and then loop through the array, accessing each element by its index using the square bracket notation. The paste() function is used to concatenate the index and element values into a single string for printing.