Print variables to the log within the data step

At any point in the data step you can say

     put <variable-list>

and the observations of the variables in variable-list will be written to the log. You can also use this in a conditional:

     data msf;
        set crsp.msf(obs=200);
        if permno>10006 then put permno date ret;
     run;

The ``obs=200'' is so that my log file does not get huge.