The subroutine operations are:
All of these operations except CASxx are available in both the traditional syntax and free-form syntax.
A subroutine is a group of calculation specifications in a program that can be processed several times in that program. Subroutine specifications must follow all other calculation operations that can be processed for a procedure; however, the PLIST, PARM, KLIST, KFLD, and DEFINE operations may be specified between an ENDSR operation (the end of one subroutine) and a BEGSR operation (the beginning of another subroutine) or after all subroutines. A subroutine can be called using an EXSR or CASxx operation anywhere in the calculation specifications. Subroutine lines can be identified by SR in positions 7 and 8. The only valid entries in positions 7 and 8 of a subroutine line are SR, AN, OR, or blanks.