Yeah; you can use nxtDisplayTextLine(nLineNumber, sFormatString, ...).
The line number is between 0 and 7 (0 being the top line of the screen). Use string formatting to insert integers and floating point decimals. For example, running this line of code ...
... would result in ...
There are a lot of other functions for displaying to the screen. Go to Window > Menu Level > Super User. This will give you more detailed preferences and show more commands in the pane on the left. In that pane, check out the stuff under the Display tab.
You should also check out the RobotC help page on Display Functions.