macro variables are global variables that can be used in different locations.. It an modify sas statements in data, proc steps;
types of variables
a) automatic <build when a sas session is created and remains till session is closed>
b) user-defined (user defines these)
- * it can be stoerd either in global symbol table or in a local symbol table.
the variables stored in open code reside in global symbol table whereas
those created in macro programs are stored in either local or global.
%let value =ram;
getting the data
we may use of period, colon to segregate the macro variable referencing.
%put &value.1;-> Note: ram1