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- exist:
-
- Synopsis: Check the existence of a variable
-
- Syntax: exist ( VAR )
-
- Description:
-
- The exist function returns TRUE (1) if VAR exists, and FALSE
- (0), if VAR does not exist. VAR is any valid variable name.
-
- If you need to know if a variable exists, and if it is a
- function or data, then use the exist function in conjunction
- with the class or type functions.
-
- See Also: class, type, who, what
-