SAS Macro

[solo1947]

Hi all,

Can someone explain how does recursive macros work. As of my understanding a macro has to be defined before calling it so, how can we call a macro without defining it

Regards

Solo

[Kurt_Bremser · Accepted solution]

During definition of a macro, no other macros are called, only the call statements are compiled. The call happens when the macro is executed, so you can have recursion.

[solo1947]

Thanks for the quick reply Sir, appreciate it.

[Tom]

It is in the execution that recursion would occur.  You always have to have defined the macro before you can execute it.

Remember that the name space for macros is flat.  At any point in time there can only be one definition for macro X.  So there is no nesting of macro definitions (recursive or not).  The nesting occurs when the macros execute.