Chapter 8: %LOCAL vs. %GLOBAL
8.2 Creating Symbol Tables and Macro Variables
8.2.1 Programming Challenge #6
8.3 Symbol Tables with CALL SYMPUT
8.4 Symbol Tables with CALL SYMPUTX
Global variables. Local variables that automatically vanish. A compendium of rules that depend on which tool creates a macro variable. Why do we need these complications?
8.1 Why Think %Locally?
Why should this be an issue? Why not just make all macro variables global, and eliminate the related complications? After all, in a %GLOBAL world, %LET would have the same effect whether it appears inside or outside of a macro. In this example, %UPPER affects the one (and only) %GLOBAL ...
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