Difference between revisions of "ISSET()"

From Recital Documentation Wiki
Jump to: navigation, search
Line 8: Line 8:
  
 
==See Also==
 
==See Also==
[[DECLARE]], [[DIMENSION]], [[LOCAL]], [[PARAMETERS]], [[PRIVATE]], [[PUBLIC]], [[RELEASE]], [[STATIC]], [[STORE]], [[TYPE()]], [[UNSET()]]
+
[[DECLARE]], [[DIMENSION]], [[LOCAL]], [[PARAMETERS]], [[PRIVATE]], [[PUBLIC]], [[RELEASE]], [[STATIC]], [[STORE]], [[TYPE()]], [[UNSET()]], [[VARTYPE()]]
  
  

Revision as of 17:08, 30 October 2009

Purpose

Function to check whether a variable exists


Syntax

ISSET(<variable name>)


See Also

DECLARE, DIMENSION, LOCAL, PARAMETERS, PRIVATE, PUBLIC, RELEASE, STATIC, STORE, TYPE(), UNSET(), VARTYPE()


Description

The ISSET() function can be used to check whether a variable exists. ISSET() will return .T. (true) if the variable named <variable name> exists and .F. (false) if it does not exist. Variables can be formally declared (PUBLIC, PRIVATE etc.) or automatically created when they are assigned a value.


Example

if isset(m_var)
  // m_var exists
endif

Products

Recital, Recital Server