Difference between revisions of "DO CASE"

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==Purpose==
 
==Purpose==
 
Multiple choice selection command
 
Multiple choice selection command
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==Products==
 
==Products==
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
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Recital Server, Recital  
 
[[Category:Documentation]]
 
[[Category:Documentation]]
 
[[Category:Commands]]
 
[[Category:Commands]]
 
[[Category:Applications]]
 
[[Category:Applications]]
 
[[Category:Applications Commands]]
 
[[Category:Applications Commands]]

Revision as of 17:05, 10 November 2009

Purpose

Multiple choice selection command


Syntax

DO CASE

CASE <condition>

[<commands>]

[CASE <condition>

[<commands>]]

[OTHERWISE

[<commands>]]

ENDCASE


See Also

@...MENU, DO WHILE, ICASE(), IF, IF(), IIF()


Description

The DO CASE command selects one course of action out of many alternatives. The Recital/4GL evaluates each CASE <condition> in turn. As soon as one of the conditions evaluates to true (.T.) the <commands> for that CASE are executed and any further case statements are ignored. Following execution of the <commands>, the program continues after the ENDCASE statement.

OTHERWISE

If an OTHERWISE statement is present and no CASE <condition> evaluates to .T., the OTHERWISE <commands> are executed.

ENDCASE

If no CASE <condition> is .T., and there is no OTHERWISE statement specified, then control skips to the next command following the ENDCASE.

CASE statements, as with all of the other Recital/4GL statements can be nested. In other words, a CASE statement can contain further DO CASE commands.


Example

accept "Enter a command: " to command
do case
    case command = "BROWSE"
        browse
    case command = "DIR"
        dir
    otherwise
        set message to "Unknown command."
endcase


Products

Recital Server, Recital