Single, Double, Triple Ampersand SAS Macro Variables

This tutorial explains how single (&), double (&&) and Triple (&&&) ampersand macro variables are resolved.

Example
%let x=temp;
%let n=3;
%let x3=result;
%let temp3 = result2; 
Check how multiple ampersand macro variables work -
%put &x&n;
%put &&x&n;
%put &&&x&n;
Rule :

The scanner reads from left to right.
  1. &x&n    : Macro variable X resolves first to temp and then N resolves to 3.   Output : temp3
  2. &&x&n : Two ampersands (&&) resolves to one ampersand (&) and scanner continues and then N resolves to 3 and then &x3 resolves to result. Output : result
  3. &&&x&n :  First two ampersands (&&) resolves to & and then X resolves to temp and then N resolves to 3. In last, &temp3 resolves to result2. Output : result2
Ampersand Macro Variables

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About Author:

Deepanshu founded ListenData with a simple objective - Make analytics easy to understand and follow. He has over 8 years of experience in data science. During his tenure, he has worked with global clients in various domains like Banking, Insurance, Telecom and Human Resource.

16 Responses to "Single, Double, Triple Ampersand SAS Macro Variables"
  1. well explained...thank you

    ReplyDelete
  2. Great stuff...keep posting

    ReplyDelete
  3. Very good stuff, really helps me a lot! Thank you very much!

    ReplyDelete
  4. Great explanation! Thank you!

    ReplyDelete
  5. amazing explanation. totally appreciate you effort i building these examples. Hats off.

    ReplyDelete
  6. what if I have &&&&&&&&&x&n ? can you please explain ?

    ReplyDelete
    Replies
    1. &&&&&&&&&x&n will give you result2

      Delete
  7. Crystal Clear..!!

    ReplyDelete

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