Param number is the parameter to read that was passed into the karel program upon its calling.
1 will read in the first parameter, 2 the second, etc. If the parameter doesn't exist, you will have a non-zero number in status.
For an example, look at my position conversion utility here.
Hi Nation,
This position convert is only for the position variables or also works for PR?
I have tested on PR but did not get the required result.