class="binding-type"><a href="https://github.com/janet-lang/janet/blob/4e5889e/src/core/os.c#L1436">source</a></span> <pre class="binding-text">(os/getenv variable &amp;opt dflt)

Get the string value of an environment variable.</pre><a href="https://janetdocs.org/os/getenv">Community Examples</a></div><hr><div class="binding"><span id="os/isatty" class="binding-sym">os/isatty</span> <span class="binding-type">cfunction</span> <span class="binding-type"><a href="https://github.com/janet-lang/janet/blob/4e58