Unix developers already have a built-in macro processor, in the form of the C preprocessor, in their compiler. Perhaps this is what accounts for m4’s relative neglect.

Macros can contain programming statements that enable you to control ... model text for SAS statements and SAS Display Manager System commands. When you want to call the macro, you use the form %macro ...

This chapter introduces the SAS macro facility using simple examples and explanation. The macro facility is a tool for extending and customizing the SAS System and for reducing the amount of text you ...