The %include statement, despite its percent sign, is not a macro statement and is always executed in SAS, though it can be conditionally executed in a macro.It can be used to setting up a macro library. But this is a least approach.

The use of %include does not actually set up a library. The %include statement POINTS to a file and when it executed the indicated file (be it a FULL program, macro DEFINITION, or a statement fragment) is inserted into the calling program at the location of the call.

When using the %include building a macro library, the included file will usually contain one or more macro definitions.%EVAL is a widely used yet frequently misunderstood SAS(r) macro language function due to its seemingly simple form.

However, when its actual ARGUMENT is a complex macro expression interlaced with special characters, mixed arithmetic and logical operators, or macro quotation functions, its usage and result become elusive and problematic. %IF condition in macro is evaluated by %eval, to reduce it to true or false.

The %include statement, despite its percent sign, is not a macro statement and is always executed in SAS, though it can be conditionally executed in a macro.It can be used to setting up a macro library. But this is a least approach.

The use of %include does not actually set up a library. The %include statement points to a file and when it executed the indicated file (be it a full program, macro definition, or a statement fragment) is inserted into the calling program at the location of the call.

When using the %include building a macro library, the included file will usually contain one or more macro definitions.%EVAL is a widely used yet frequently misunderstood SAS(r) macro language function due to its seemingly simple form.

However, when its actual argument is a complex macro expression interlaced with special characters, mixed arithmetic and logical operators, or macro quotation functions, its usage and result become elusive and problematic. %IF condition in macro is evaluated by %eval, to reduce it to true or false.