You're programming the Arduino. That means that the little black chip in the middle reads the code and turns on and off switches depending on what the code says. If you pull the arduino with its black chip out, your circuit just sits there.
You program the Arduino. I'm confused as to what you're talking about.
If you want the Arduino to keep doing stuff, you'll need to leave it in the project. If you're done with that device/project, you can re-use it for something else.
@someone somewhere, thanks for the quick reply. So if I disconnect the Arduino from the project, the project will no longer do what I programmed it for?
You're programming the Arduino. That means that the little black chip in the middle reads the code and turns on and off switches depending on what the code says. If you pull the arduino with its black chip out, your circuit just sits there.