exist (MathScript RT Module Function)
Owning Class: membership
Requires: MathScript RT Module
Syntax
c = exist(a)
c = exist(a, option)
Description
Determines whether a variable, file, LabVIEW MathScript function, or directory exists.
Inputs
| Name | Description | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| a | Specifies the name of the variable, file, function, or directory that you want to determine exists. a is a string. | ||||||||
| option | Specifies the type of item for which you want to search. option is a string that accepts the following values.
|
Outputs
| Name | Description | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| c | Determines whether a exists. c is an integer that can return the following values.
|
Details
If you call this function from a MathScript Node, LabVIEW operates with slower run-time performance for the MathScript Node. To optimize the performance of the MathScript Node, remove this function from scripts.
This function is not supported in the LabVIEW Run-Time Engine. Do not use this function in a stand-alone application or shared library.
Examples
A = 'I do exist'
C = exist('A')