why the text 'This will go to the default output destination' can't be appear in log

[tianerhu]

data _null_;
   file print;
   put 'This will go to the default output destination';
   
run;

[ballardw]

When you provide a file then then the PUT output is directed to the file, i.e. File Print.

To "force" text to the log only use Putlog instead of Put.

[tianerhu]

Thank you for your help.

[Tom · Accepted solution]

Because you told it not to.

If you want some messages written to the log while also writing some information to a file use the PUTLOG statement instead.

data _null_;
   put 'PUT before FILE statement will go to the SAS log.';
   file print;
   put 'This will go to the open output destination(s).';
   putlog 'This will go to the SAS log.';
run;

[tianerhu]

data Females;
   input @14 Gender $1.;
   put 'After first input ' _all_;
   
   if Gender ne 'F' then delete;
   put 'After delete ' _all_;
   input @1 Subj $3.
         @4 DOB mmddyy10.
         @15 Balance 7.;
   put 'After second Input ' _all_;
datalines;
00110/21/1955M   1145
00211/18/2001F  18722
00305/07/1944M 123.45
00407/25/1945F -12345
;

but  the text of the 'put statement' in this program can appear in log

[Tom]

Because in this data step you did NOT tell it to route the output to the PRINT file instead of the LOG file.

[tianerhu]

Thank you very much.