How to print the observation no in to seperate data set

[deleted_user]

hi ,
my data like this...
name rno marks
aaa 1 23
bbb 2 34

but i want out put like this
obsno name rno marks
1 aaa 1 23
2 bbb 2 34


thanks
sree

[BrunoSilva]

you can use _N_ see my example:

data work.teste;
format obsno 8.;
set sashelp.class;
obsno=_N_;
run;


i hope this help