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The EXISTS function determines whether an object is defined in any attached workspace. The EXISTS function is useful in a program to test whether a definition exists before you try to use it.
A text expression that specifies the name you want to test.
Specifying More Than One Name
When name-expression contains the names of more than one object, EXISTS returns
NO even when all the objects specified by name-expression exist in attached workspaces.
Example 7-79 Using EXISTS
This example tests whether the variable
actual has been defined in any attached workspace. The statement
produces the following result.