I have a question about the print_first_word and print_last_word function in ex25.
In this function, whatever varies i entered, it will cut the first or last word and return the varies (“words” in this example) back to the global environment. I am confused because in these two functions, i didn’t return the varies “function” back to the global environment. All the changes about “words” should remained within the function. Isn’t it?