HP 3000 Manuals

<NULL> [ HP DeskManager Customization ] MPE/iX 5.0 Documentation

HP DeskManager Customization

<NULL> 

Syntax 

<NULL [string] >

where:

string                quoted string or unquoted string

Description 

<NULL> returns 1 (TRUE) if string is a null string ("") or is not
provided.  If string contains any characters at all, the function returns
0 (FALSE).

Example 

     &BACK again <EQUAL <NULL <PROMPT "Press RETURN">>>

This causes a jump back to the label again if the user replies to the
prompt by pressing Return.

MPE/iX 5.0 Documentation