The name of a runway is a two-digit number indicating its direction in tens of degrees.
For example, to land west-to-east, use runway 09.
Generally, each runway paving may be used in either direction, and the physical paving actually contains two logical runways, running in opposite directions. Only one of these logical runways is allowed to be in use an any time.
Thus a paving aligned east-west will contain logical runway 9