Answer / naga

& is used to resolve the direct macro reference.
&& is used to resolve the indirect macro reference.
for example let us assume we need to resolve city1 to banglore
%let &city&n /*incorrect*/
%let &&city&n /*correct*/

Answer / subbu

%let a=sai;
%let b=kumar;


%let c=&a.&b;

%put &c;

Answer / smriti

& represents that it is a macro variable and && is used to
replace the macro variable with the value of the variable.

Answer / alla

when concatinating two macro variable
%let a=sai;
%let b=kumar;
%let &a &b;it resolves as sai kumar
if u want to remove the space b/t then use
%let &&a&b; it resolves as saikumar
when you use %let &a&b;resolves as &akumar

Answer / srk

there is nothing difference b/w & and && for resolving
macros both are same..these are two types of syntax for
resolving macro variable.

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