.ALTERNATE ! test of expression operator define MACRO val, string SDATA val SDATA string ENDM define "1","99%of100" ! notice % within string define %1 + 2, "=3" define % 1 + 2 %3+4 define %3*4-2 <=10> define %3*4-2 5 define %1 + 2, ! has no effect end