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$Linked

is True if the Wolfram Language kernel is being run through WSTP.

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Basic Examples  
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$Linked

$Linked

is True if the Wolfram Language kernel is being run through WSTP.

Details

  • $Linked is True when the Wolfram System is being run with a front end.
  • $Linked is typically False when the Wolfram System is being run with a text‐based interface.

Examples

Basic Examples  (1)

Test whether the Wolfram Language kernel is being run through WSTP:

$CommandLine shows that the kernel was called in WSTP mode:

Wolfram Research (1991), $Linked, Wolfram Language function, https://reference.wolfram.com/language/ref/$Linked.html.

Text

Wolfram Research (1991), $Linked, Wolfram Language function, https://reference.wolfram.com/language/ref/$Linked.html.

CMS

Wolfram Language. 1991. "$Linked." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/$Linked.html.

APA

Wolfram Language. (1991). $Linked. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$Linked.html

BibTeX

@misc{reference.wolfram_2025_$linked, author="Wolfram Research", title="{$Linked}", year="1991", howpublished="\url{https://reference.wolfram.com/language/ref/$Linked.html}", note=[Accessed: 15-August-2025]}

BibLaTeX

@online{reference.wolfram_2025_$linked, organization={Wolfram Research}, title={$Linked}, year={1991}, url={https://reference.wolfram.com/language/ref/$Linked.html}, note=[Accessed: 15-August-2025]}