8.9.2 IsDefine or IsDef (check whether a variable is defined)

Purpose

Checks whether a variable is defined and returns True or False.

Syntax

IsDefine (VarName)
IsDef (VarName)

Argument

VarName

Specify a variable to evaluate.

Description

The IsDefine or IsDef command checks whether the specified variable is defined. The command returns True if the variable is defined, or False if not.

Example

' Branch to another process if location variable %1
' is specified.
If IsDefine (%1) Then
  Exec ("CallProc01.SPT", True, %1)
Else
  Exec ("CallProc02.SPT", True)
End If

JP1/Script version

Supported from JP1/Script 01-00.

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