IsSet Function

Action

Tests whether a variable has been assigned an initial value.

Syntax

bTest = IsSet(aVar)

Variable	Description
`bTest`	TRUE if the variable has been assigned. BOOLEAN.
`aVar`	The variable to check. ANYTYPE.

Notes

IsSet checks whether a variable has been assigned an initial value, returning TRUE if it has been assigned a value or FALSE if it has not.

For aggregate types, for example LIST OF and records, IsSet() is implementation-dependent. You should only call IsSet() against the individual items of that type.

Example

STRING s // uninitialized variable
INTEGER i = 1 // initialized variable
Print (IsSet (s)) // prints: FALSE
Print (IsSet (i)) // prints: TRUE