Quick Run-down of the Different Channel Helis

Here's a quick run down of the different types of channels for helicopters:

A 2-channel heli can go up/down(throttle) and spin left/right(yaw)
A 3-channel heli can go up/down(throttle), spin left/right(yaw) and go forwards/backwards(elevator)
A 4-channel heli can go up/down(throttle), spin left/right(yaw), go forwards/backwards(elevator) and go side to side or let/right(aileron)
A 5-channel heli can go up/down(throttle), spin left/right(yaw), go forwards/backwards(elevator), go side to side or let/right(aileron) and increase/decrease pitch(pitch)

The more advanced you are, the higher the channel!