title: Mars Rovers coding excercise, what is the use of Upper Right coordinates(5,5)?
body: <p>The mars Rover coding exercise can be read here <a href="https://github.com/microcosm/MarsRover" rel="nofollow noreferrer">https://github.com/microcosm/MarsRover</a></p>
  
  <p>I completed this exercise. I see upper right coordinates mentioned as 5,5. And lower as 0,0. Why have they mentioned this? Is it a boundary?</p>
  
  <p>I implemented a check in my code to not let the rover go beyond these two coordinates. I just assumed and did it. Was that the reason why upper coordinates where given? So -1,0 or 5,6 is wrong?</p>