Determine the value of the operating system variable.
This function returns the value of a specified operating system environment variable-for example, as stored by the DOS PATH variable. If the variable exists, its value is returned as a string; if it does not exist, nil is returned.
Examples
| Code | Returns |
|---|---|
| (getenv "PATH") | C:\\;C:\\WIN95;C:\\ICAD |
| (getenv "junk") | nil |
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Programming Overview of LISP (LISt Processing) Language
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