topic Re: Why ";" is not needed after do in the code? in SAS Programming

Why ";" is not needed after do in the code?

Linlin — Wed, 09 May 2012 14:30:28 GMT

Hi All,

I am curious to know why missing ";" after do did not cause problem in the code below?

data have;

id=1;

input letter $8.;

cards;

but

bur

butter

;

proc transpose data=have out=temp;

by id;

var letter;

run;

data want;

set temp;

array _s(*) col:;

do _n_=1 to dim(_s) ;

if lengthn(_s(_n_))=1 and _s(_n_)="b" then do score1=1; score+1;end;

else if lengthn(_s(_n_))=2 and _s(_n_)="bu" then do score2=1; score+1;end;

else if lengthn(_s(_n_))=6 and _s(_n_)="butter" then do score6=1; score+1;end;

end;

proc print;run;

Thanks - Linlin

Message was edited by: Linlin

Re: Why ";" is not needed after do in the code?

PGStats — Wed, 09 May 2012 14:47:05 GMT

You have inadvertantly defined iterative do loops, as in :

do i = 1, 10, 100;

score + i;

end;

except that the list of values for the control variable contains a single value. It thus executes only once, which is also what the do block would have done. So in the end, with or without the ";", the result is the same. Interesting. Thanks for brinning it up Linlin.

Re: Why ";" is not needed after do in the code?

Linlin — Wed, 09 May 2012 15:09:43 GMT

Thank you PG for your explanation! I was so scared when I found out the missing ";". - Linlin