Log:

28   proc contents data = sasuser.airplanes;
29   run;

NOTE: PROCEDURE CONTENTS used (Total process time):
      real time           0.43 seconds
      cpu time            0.01 seconds

Commentary:
The CONTENTS procedure shows the contents of a SAS data set with descriptors and prints the directory of the SAS library. The output displays information about the data set, such as the number of variables, the number of observations, and the creation and modification dates. It also displays information about the SAS version used to create the data set. In addition, it displays information on each of the variables in the data set—the variable name, type, and storage length.

For more information please to the following:
SAS.com CONTENTS Procedure

Below is the output produced by PROC CONTENTS: