Mathematica > Core Language > Tuning & Debugging > Low-Level System Optimization > GetEnvironment
BUILT-IN MATHEMATICA SYMBOL

GetEnvironment

GetEnvironment["var"]
gives the setting corresponding to the variable in the operating system environment.

GetEnvironment[{"var1", "var2", ...}]
gives a list of rules, corresponding to specified environment variables.

GetEnvironment[]
gives information about all existing settings in the operating system environment.

DetailsDetails

  • GetEnvironment[All] is the same as GetEnvironment[].
  • GetEnvironment returns results in the form "var"->value, where value is the value of a corresponding environment variable .
  • If the variable is found in the environment, the value is a string, possibly empty.
  • If the variable is not defined in the environment, GetEnvironment returns "var"->None.
  • Names and values of the variables defined in the operating system environment depend on the computer system you are using.

ExamplesExamplesopen allclose all

Basic Examples (5)Basic Examples (5)

Get a value for the environment variable :

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Value for the undefined environment variable:

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Find all defined environment variables:

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Get values for several variables:

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Environment variables are accessible to child processes. On Windows:

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On Unix:

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