topic Re: Do but not %do in SAS Programming

Do but not %do

supersonic — Thu, 20 Jun 2013 08:51:02 GMT

Can anyone please give an example where a do loop can be used but %do loop cannot be used

kuridisanjeev — Thu, 20 Jun 2013 09:07:15 GMT

Hi..

%Do can be used only with in the Macro,but in case of Do,you can use any where of the program even with in the macro.

which means you can not use %do in open code..

Data Test;

%do i=1 %to 10;

output;

%end;

Run;

Above code gives you error,so in above scenario you need to use Do.

Hope this helps..

Regards.

Sanjeev.K

kuridisanjeev — Thu, 20 Jun 2013 09:13:09 GMT

Edited my post and given small example too..

Hope that is what you looking for..

Regards.

Sanjeev.K

Ksharp — Thu, 20 Jun 2013 11:27:10 GMT

You can do it:

do i=1 to 10 by 0.1 ;

But you can not do it:

%do i=1 %to 10 by 0.1;

supersonic — Thu, 20 Jun 2013 12:06:44 GMT

thank u

do i=1,2,3; will work

%do i=1,2,3; will give an error

kuridisanjeev — Thu, 20 Jun 2013 12:42:12 GMT

Ohhh too good to know that..

But why we can't use By in %do ??

is there any reason ???

Regards.

Sanjeev.K

Astounding — Thu, 20 Jun 2013 13:26:42 GMT

You can use %BY, but you can't use a decimal fraction like 0.1.

The last construction where DO can be used but %DO cannot is a combination of a range with WHILE or UNTIL.

Legitimate: do i=1 to 10 until (age > 21);

No good: %do i=1 %to 10 %until (&age > 21);

You can use %DO %WHILE or %DO %UNTIL, you just can't combine that with a range of values.