When the clutch is pressed down the engine is disengaged from the wheels.
When the clutch is released,providing the engine is programmed in a suitable gear the engine will drive in that gear.
Clutch control is a vital part of driving.
Travelling for any distance with the clutch fully down to the floor is known as coasting and must be kept to a minimum. After a gear has been selected you must allow the clutch back up so to engage the new gear. When coming to a stop make sure to brake before clutching.
Always release the clutch in a controlled manner as coming quickly off the clutch can cause the car to jerk or stall.
The clutch should be used on two occasions only
1.    When changing gear.
2.    Just before stopping.