Macro '&&&' could not be recognized?

[ybz12003]

Hello,

I wrote a program to assign a new column 'Class' corresponding to different dataset names.   I found out the class is shown in '&&Y&i.', and not the individual dataset name.  I have Please let me know how to fix it.  Thank you.

%let Y1=ulung;
%let Y2=uheme;
%let Y3=ucancer;
%let Y4=utransplant;
%let Y5=ugm;

%macro assign;
	%do i = 1 %to 5;
    data &&Y&i.. (keep=Underlying_Cond class);
		set &&Y&i.;
			Underlying_Cond=strip(Upcase(Underlying_Conditions));
			Class='&&Y&i..';
		run;
	
	%end;
%mend;
%assign;

[PaigeMiller · Accepted solution]

Text that contains macro references should be enclosed in double-quotes, not single-quotes.

[novinosrin]

Perhaps you are missing double quotes?

Class="&Y&i..";

[Tom]

The reason the value is literally

&&Y&i..

is because that is that you asked it to do.

If you want string values to be evaluated by the macro processor use double quote characters instead of single quote characters. 

Class="&&Y&i..";