Terry you are learning macro language

It is not easy and i hope you have current pratice of sas since almost one year as macro is only generating text which must be future sas correct code!

here some comment about your problem:

There are statements which you may use only in a macro %macro ... %mend; your error %do... in open code

this also induct that you must be carefull about the scope of your macro variable

a %let in open code (=outside %macro...) generate a global scope but inside a %macro the scope could be local

the best is that you read and work some good start papers see http://www2.sas.com/proceedings/sugi28/056-28.pdf www2.sas.com/proceedings/sugi29/243-29.pdf

HTH Andre

he.terry@gmail.com a écrit : > I have two programs. One is right and the other is wrong. I am not > sure about the reason. > > The right code is as follow: > > options symbolgen mprint; > %let m=2; > %macro b; > %do i = 1 %to &m; > &i > %end; > %mend b; > > %let c = %b > ; > > > %macro a; > %put &c; > %mend a; > %a; > > The wrong code is as follow: > options symbolgen mprint; > %let m=2; > %let c = %do i = 1 %to &m; > &i > %end; > ; > > > %macro a; > %put &c; > %mend a; > %a; > >

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