Environment Variables - Untitled
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### 35.7 Environment Variables

— Built-in Function: getenv (var)

> Return the value of the environment variable var. For example,

>               getenv ("PATH")

> returns a string containing the value of your path.

— Built-in Function: putenv (var, value)
— Built-in Function: setenv (var, value)

> Set the value of the environment variable var to value.