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GetEnvironment

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GetEnvironment["var"]

gives the setting corresponding to the variable “var” in the operating system environment.

GetEnvironment[{"$var_1$“, ”$var_2$", ...}]

gives a list rules for each of the environment variables listed.

GetEnvironment[]

gives a list rules for all environment variables.

On POSIX systems, the following gets the users HOME directory:

• • GetEnvironment["HOME"]

We can get both the HOME directory and the user name in one go:

• • GetEnvironment[{"HOME", "USER"}]

Arguments however must be strings:

• • GetEnvironment[HOME]

See also Environment and SetEnvironment.