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<a name="Environment-Variables-1"></a>
<h3 class="section">36.7 Environment Variables</h3>
<a name="XREFgetenv"></a><dl>
<dt><a name="index-getenv"></a>Built-in Function: <em></em> <strong>getenv</strong> <em>(<var>var</var>)</em></dt>
<dd><p>Return the value of the environment variable <var>var</var>. For example,
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<pre class="example">getenv ("PATH")
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<p>returns a string containing the value of your path.
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<dt><a name="index-putenv"></a>Built-in Function: <em></em> <strong>putenv</strong> <em>(<var>var</var>, <var>value</var>)</em></dt>
<dt><a name="index-setenv"></a>Built-in Function: <em></em> <strong>setenv</strong> <em>(<var>var</var>, <var>value</var>)</em></dt>
<dd><p>Set the value of the environment variable <var>var</var> to <var>value</var>.
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