Formatting counter in SAS macro

[DanWALDO]

I have a series of files that I wish to concatenate ... named file01, file02, file03 ... file12.

If I use the code

set

%do i=01 to 12;

file&i;

%end;

;

the files are named file1, file2, ... file12.

How can I force the macro to use the 2-digit (zero-filled) form of the counter?

Thanks!

[jakarman]

https://communities.sas.com/message/127712

[Tom · Accepted solution]

You can replace the value of I with a value with a leading zero inside the loop and it will not break the looping.  You can then use &I where you need it.

%macro test ;

%do i=1 %to 10 ;

  %let i=%sysfunc(putn(&i,Z2));

  %put i=&i ;

%end;

%mend ;

%test;

[DanWALDO]

Thanks to both Jaap and Tom ... I'm in business!