I think it would be good for you to learn Latex. Limits don't look very nice typed out like so. Click on this image to see how to make the basic setup:
What does "int" mean?
Ok. Well assuming it's the greatest integer function (not the least integer function), this means that all decimals will round down to the previous integer (positive ones). So int(5.5)=5. This graph makes clear jumps, so limits can be seen easily. First consider the point f(7/2) - if it exists and what it is if so. Then since you are taking a right-sided limit look at points to the right of this. Remember that the limit is what value it is approaching, not necessarily what the value is at the point.