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Evaluator

is an option for objects such as Button, Dynamic, and Cell that gives the name of the kernel to use to evaluate their contents.

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Evaluator

Evaluator

is an option for objects such as Button, Dynamic, and Cell that gives the name of the kernel to use to evaluate their contents.

Details

  • The default setting is typically Evaluator->"Local".
  • Evaluator->None specifies that no evaluation should be done.
  • Evaluator is more often set at a global level or at the level of whole notebooks than at the level of individual cells or other objects.

Examples

Basic Examples  (1)

Create input cells with different Evaluator settings:

Wolfram Language code: nb = CreateDocument[{ExpressionCell[Defer[2 + 2], "Input", Evaluator -> None], ExpressionCell[Defer[2 + 2], "Input", Evaluator -> "Local"]}];SelectionMove[nb, All, Notebook]

The first cell has no evaluator; the second cell uses the evaluator named "Local":

Wolfram Language code: SelectionEvaluate[nb]
Wolfram Research (1996), Evaluator, Wolfram Language function, https://reference.wolfram.com/language/ref/Evaluator.html.

Text

Wolfram Research (1996), Evaluator, Wolfram Language function, https://reference.wolfram.com/language/ref/Evaluator.html.

CMS

Wolfram Language. 1996. "Evaluator." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Evaluator.html.

APA

Wolfram Language. (1996). Evaluator. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Evaluator.html

BibTeX

@misc{reference.wolfram_2026_evaluator, author="Wolfram Research", title="{Evaluator}", year="1996", howpublished="\url{https://reference.wolfram.com/language/ref/Evaluator.html}", note=[Accessed: 13-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_evaluator, organization={Wolfram Research}, title={Evaluator}, year={1996}, url={https://reference.wolfram.com/language/ref/Evaluator.html}, note=[Accessed: 13-June-2026]}