how to generate sequence number per every 5 obs?

[HitmonTran]

HI,

I need to generate a sequence number per every 5 obs.

below is the data with variable "var".  I want variable "seq" .  THank you

data  :

var       seq

aa	1
bb	1
cc	1
dd	1
ee	1
ff	2
gg	2
hh	2
ii	2
jj	2

[novinosrin · Accepted solution]

data have;
input var $;
cards;
aa	1
bb	1
cc	1
dd	1
ee	1
ff	2
gg	2
hh	2
ii	2
jj	2
;

data want;
  set have;
  if mod(_n_,5)=1 then seq+1;
run;