RosettaCodeData/Task/Permutations/SAS/permutations.sas

/* Store permutations in a SAS dataset. Translation of Fortran 77 */
data perm;
  n=6;
  array a{6} p1-p6;
  do i=1 to n;
    a(i)=i;
  end;
L1:
  output;
  link L2;
  if next then goto L1;
  stop;
L2:
  next=0;
  i=n-1;
L10:
  if a(i)<a(i+1) then goto L20;
  i=i-1;
  if i=0 then goto L20;
  goto L10;
  L20:
  j=i+1;
  k=n;
L30:
  t=a(j);
  a(j)=a(k);
  a(k)=t;
  j=j+1;
  k=k-1;
  if j<k then goto L30;
  j=i;
  if j=0 then return;
L40:
  j=j+1;
  if a(j)<a(i) then goto L40;
  t=a(i);
  a(i)=a(j);
  a(j)=t;
  next=1;
  return;
  keep p1-p6;
run;