This method corresponds to the system's getenv(const char*) function. The parameter it accepts indicates the name of the environment variable whose value should be retrieved. If the indicated environment variable is found, the value is returned as a string object. If the variable is not found, void is returned to indicate that the variable did not exist.
Check your operating system's documentation for the exact behavior of this function.
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:~/bin This result will vary
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