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$EvaluationEnvironment
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$EvaluationEnvironment

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gives a string indicating the type of local or cloud environment in which the current Wolfram Language evaluation is being performed.

Details

  • Typical values for $EvaluationEnvironment include:
  • "Session"local or cloud interactive session
    "Script"script run in batch mode
    "Subkernel"parallel or grid subkernel
    "WebEvaluation"cloud evaluation initiated by an HTTP request
    "WebAPI"API called through an HTTP request
    "Scheduled"scheduled task
    "BatchJob"remote batch job
  • The "Script" environment is used by wolframscript for local script execution.
  • The "WebEvaluation" environment is used by CloudEvaluate and by wolframscript -cloud.
  • The "WebAPI" environment is used when code in Delayed, APIFunction, FormFunction, etc. is executed as a result of a web request.
  • The "BatchJob" environment is used for code run via RemoteBatchSubmit and RemoteBatchMapSubmit.

Examples

open allclose all

Basic Examples  (2)Summary of the most common use cases

In an interactive session, the evaluation environment is "Session":

In[1]:=1
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https://wolfram.com/xid/0v6l4asctw2fm-7jrvgv
Out[1]=1

Remote evaluation in the cloud gives a different result:

In[1]:=1
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https://wolfram.com/xid/0v6l4asctw2fm-e1fa7j
Out[1]=1

Scope  (5)Survey of the scope of standard use cases

Interactive session:

In[1]:=1
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https://wolfram.com/xid/0v6l4asctw2fm-uou8s1
Out[1]=1

A remote evaluation inside CloudEvaluate:

In[1]:=1
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https://wolfram.com/xid/0v6l4asctw2fm-x8cuui
Out[1]=1

An evaluation in an API call:

In[1]:=1
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https://wolfram.com/xid/0v6l4asctw2fm-4h6vj3
Out[1]=1
In[2]:=2
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https://wolfram.com/xid/0v6l4asctw2fm-ogdtkn
Out[2]=2
In[3]:=3
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https://wolfram.com/xid/0v6l4asctw2fm-hx4qec

An evaluation in a cloud task:

In[1]:=1
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https://wolfram.com/xid/0v6l4asctw2fm-iswzkc
Out[1]=1

Once the task is finished, the saved environment can be retrieved:

In[2]:=2
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https://wolfram.com/xid/0v6l4asctw2fm-hhxgtb
Out[2]=2

Parallel subkernels are identified as "Subkernel":

In[1]:=1
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https://wolfram.com/xid/0v6l4asctw2fm-je5df2
Out[1]=1
Wolfram Research (2014), $EvaluationEnvironment, Wolfram Language function, https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html (updated 2019).
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Wolfram Research (2014), $EvaluationEnvironment, Wolfram Language function, https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html (updated 2019).

Text

Wolfram Research (2014), $EvaluationEnvironment, Wolfram Language function, https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html (updated 2019).

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Wolfram Research (2014), $EvaluationEnvironment, Wolfram Language function, https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html (updated 2019).

CMS

Wolfram Language. 2014. "$EvaluationEnvironment." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2019. https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html.

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Wolfram Language. 2014. "$EvaluationEnvironment." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2019. https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html.

APA

Wolfram Language. (2014). $EvaluationEnvironment. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html

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Wolfram Language. (2014). $EvaluationEnvironment. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html

BibTeX

@misc{reference.wolfram_2025_$evaluationenvironment, author="Wolfram Research", title="{$EvaluationEnvironment}", year="2019", howpublished="\url{https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html}", note=[Accessed: 08-May-2025 ]}

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@misc{reference.wolfram_2025_$evaluationenvironment, author="Wolfram Research", title="{$EvaluationEnvironment}", year="2019", howpublished="\url{https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html}", note=[Accessed: 08-May-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_$evaluationenvironment, organization={Wolfram Research}, title={$EvaluationEnvironment}, year={2019}, url={https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html}, note=[Accessed: 08-May-2025 ]}

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@online{reference.wolfram_2025_$evaluationenvironment, organization={Wolfram Research}, title={$EvaluationEnvironment}, year={2019}, url={https://reference.wolfram.com/language/ref/$EvaluationEnvironment.html}, note=[Accessed: 08-May-2025 ]}