• Writing a text file
• Getting rid of trailing spaces after a text (and also getting rid of a line that has no information.)
  data out2;
  set out;
  eachline=trim(eachline);
  LEN=length(eachline);
  run;
  data _null_;set out2;
  counts=lengthn(eachline2);
  if counts ne 0;
  file "&updated";
  put (eachline) ($VARYING250. LEN);
  run;
  
• Reading a text file as a data set with one variable (see below)

%let filename=c:\temp\temp.txt;
filename ABC "&filename";
data XXX;
infile ABC length=lg;input @;input @1 eachline $varying200. lg;
run;