HP 3000 Manuals

SPL to HP C/XL Migration Guide

Program Control 

SPL has nine basic methods of altering the normal sequential execution of
instructions:  CASE, DO, FOR, GOTO, IF, RETURN, and WHILE statements, and
procedure and subroutine call statements.

HP C/XL has equivalents for all these control statements, with some
variations in syntax.  In general, HP C/XL provides more options and
control than SPL.

MPE/iX 5.0 Documentation