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<h3 class="section">34.7 Environment Variables</h3>
<!-- sysdep.cc -->
<p><a name="doc_002dgetenv"></a>
<div class="defun">
— Built-in Function: <b>getenv</b> (<var>var</var>)<var><a name="index-getenv-2422"></a></var><br>
<blockquote><p>Return the value of the environment variable <var>var</var>. For example,
<pre class="example"> getenv ("PATH")
</pre>
<p class="noindent">returns a string containing the value of your path.
</p></blockquote></div>
<!-- sysdep.cc -->
<p><a name="doc_002dputenv"></a>
<div class="defun">
— Built-in Function: <b>putenv</b> (<var>var, value</var>)<var><a name="index-putenv-2423"></a></var><br>
— Built-in Function: <b>setenv</b> (<var>var, value</var>)<var><a name="index-setenv-2424"></a></var><br>
<blockquote><p>Set the value of the environment variable <var>var</var> to <var>value</var>.
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