HP 3000 Manuals

MPE V to MPE XL: Getting Started

Lesson 3:  IF 

The IF (...ENDIF) command has been modified in MPE XL to allow for
expression evaluation, and it now also supports ELSEIF.

Consider the following command file:

       IF LFT (HPDATEF,3) = "MON" THEN
        ECHO Reminder--Staff Meeting at 11:00
       ELSEIF LFT (HPDATEF,3) = "THU" THEN
        ECHO Reminder--Weekly Dept. Meeting at 9:30
       ELSE
         ECHO Have a nice day!
       ENDIF

In the example above, if it is Monday (the first three letters of HPDATEF
= MON), Reminder...Staff Meeting at 11:00 will echo to the screen; if it
is Thursday (the first three letters of HPDATEF = THU), the reminder of
the 9:30 meeting will appear; and if it is any other day of the week,
Have a nice day!  is printed on the screen.

Exercise 

5.   Using the IF command, write a logon UDC that reminds you to do
     something every other day.  HINT: use (HPDAY MOD 2).

MPE/iX 5.0 Documentation