Display a variable from ARDUINO board

Dear all,

I would like to display numeric values of a certain variable from a program running on the ARDUINO board. It would be helpful to display the data on the Arduino – 0012 Alpha which is activated on my window terminal. I thought that the black part under the program editor was supposed to be used for this type of actions. He displays some Binary sketch size once a program is uploaded.
However, I do not know how I can get the data back from the processor to be displayed. This is very easy with MATLAB and usual C++ editors.

Sincerely yours
Mostafa

Once your program is running on the Arduino and there is something being printed to the serial port you should see it when using the monitoring function. Mouse over the icon's in the arduino program on your computer and click on the one that says "serial monitor"