You could have a function like this. Maybe it's defined up to there, then it's, you have a circle there, then it keeps going. Maybe it's not defined at all for any of these values. And then maybe down here, it is defined for all x values greater than or equal to four and it just goes right through negative six. So notice, all of these functions as x approaches five, they all have the limit defined and it's equal to negative six, but these functions all look very, very, very different. Now another thing to appreciate is, for a given function, let me delete these, oftentimes we're asked to find the limits as x approaches some type of an interesting value. So for example, x approaches five, five is interesting right over here because we have this point discontinuity.