Macro and macro variable

[HeatherNewton]

If I create macro e.g. %macro(source, file,ID), does it automatically define source, file and id as macro variable as I see &source and dont see a statement declarinf source as macro variable..

[Patrick]

You really need to learn how to use the SAS documentation!
https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.5/mcrolref/p1nypovnwon4uyn159rst8pgzqrl.htm 

[Tom]

If you DEFINE a macro name MYMACRO with a statement like:

%macro mymacro(source, file,ID);

Then the macro's parameters ( SOURCE, FILE and ID) will all be LOCAL macro variables.

Try it:

943  %macro mymacro(source, file,ID);
944  %put _local_;
945  %mend mymacro;
946  %mymacro;
MYMACRO FILE
MYMACRO ID
MYMACRO SOURCE

[Cynthia_sas]

Hi: This paper may help you get started understanding SAS Macro program parameters and how to define them and how to use them: https://support.sas.com/resources/papers/proceedings13/120-2013.pdf

Cynthia

[Reeza]

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@HeatherNewton wrote:
 dont see a statement declarinf source as macro variable..

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Variables and macro variables do not have to be declared in SAS.