HP 3000 Manuals HP 3000 Manuals
Chapter 6 Solutions to Module 6 Variables and Expressions
Lesson 1 Understanding Variables
Q 6-1 The following are acceptable names for variables:
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| Variable Name |
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| b. CIERROR |
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| c. FRED_FLINTSTONE |
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| d. HPINPRI |
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| f. _JAMES_BOND |
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Q 6-2 According to the values assigned them (by the user
or the system), the variables listed below are of
the specified type:
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| Variable Type |
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| HPJOBLIMIT (number of jobs allowed to run): integer |
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| HPJOBCOUNT (number of jobs currently running): integer |
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| RESPONSE (user response - either Y or N): string |
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| FILE NAME (user-supplied file name): string |
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Q 6-3 Hint: HELP VARIABLESReturn. According to the Help
facility, each of the following variables are
defined.
Hint: SHOWVAR variablenameReturn
Their current values depend on your system:
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| Variable Current Value Definition |
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| HPJOBLIMIT 7 Current job limit. |
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| HPSESLIMIT 60 Current session limit. |
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| HPPROMPT : The initial system prompt. |
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| HPPATH HPGROUP,PUB, Current search path |
| PUB.SYS |
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| HPVERSION X.11.50 Current version of operating |
| system. |
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| HPUSER USER1 User name. |
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| HPSESCOUNT varies with the system Current number of sessions. |
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Q 6-4 To list all the system-defined and user-defined
variables, enter this command:
SHOWVAR @
Q 6-5 The system-defined variables in the STATS command
file are the following:
HPJOBLIMIT
HPJOBCOUNT
Q 6-6 No, neither variable is user-modifiable.
Q 6-7 In the LF command file, the three user-defined
variables are:
RESPONSE
FILE NAME
OPTION
Exercise 6-1: Variables
1. To define a variable called MYPROMPT and assign it the value
currently stored in HPPROMPT, enter the following:
SETVAR MYPROMPT HPPROMPT
2. To display the value of MYPROMPT, enter the following:
SHOWVAR MYPROMPT
3. To delete MYPROMPT and verify that it is gone, enter the
following:
DELETEVAR MYPROMPT
SHOWVAR MYPROMPT
MYPROMPT is a user-defined variable.
HPPROMPT is a system-defined variable.
You cannot delete system-defined variables.
********* End of Exercise 6-1 **********