about the option headline of report

[tianerhu]

I can't see the difference between two programs which one including headline and the other without headline ? why

(the explanation about headline in textbook)

[Tom · Accepted solution]

What output destination are you using?

proc report data=sashelp.class(obs=3) headline; run;
proc report data=sashelp.class(obs=3) ; run;

Make sure the LISTING output is turned on.

[tianerhu]

Thank you so much .
yes, listing output ,listing output, haha.