Difference between revisions of "DO CASE"

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==Description==
 
==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.
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The DO CASE command selects one course of action out of many alternatives.  Recital 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====
 
====OTHERWISE====
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If no CASE <condition> is .T., and there is no OTHERWISE statement specified, then control skips to the next command following the 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.
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CASE statements, as with all of the other Recital statements can be nested.  In other words, a CASE statement can contain further DO CASE commands.
  
  

Latest revision as of 14:04, 14 January 2010

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. Recital 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 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