 The word + adds it to the previous product . The CR moves the output to a new line ( it is only for formatting purposes and could be omitted but - in most implementations - without it the output would occur on the same line as the input and would be less readable in the example ) . Finally , the . command prints the result to the user 's terminal . As everything has completed successfully at that point , the text interpreter then outputs the prompt " ok " and moves to a new line to get more input without needing anything explicit to do that . 
