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 <a name="SCAN"></a>
 <div class="header">
 <p>
 Next: <a href="SECNDS.html#SECNDS" accesskey="n" rel="next">SECNDS</a>, Previous: <a href="SCALE.html#SCALE" accesskey="p" rel="prev">SCALE</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
 </div>
 <hr>
 <a name="SCAN-_002d_002d_002d-Scan-a-string-for-the-presence-of-a-set-of-characters"></a>
 <h3 class="section">8.212 <code>SCAN</code> &mdash; Scan a string for the presence of a set of characters</h3>
 <a name="index-SCAN"></a>
 <a name="index-string_002c-find-subset"></a>

 <dl compact="compact">
 <dt><em>Description</em>:</dt>
 <dd><p>Scans a <var>STRING</var> for any of the characters in a <var>SET</var>
 of characters.
 </p>
 <p>If <var>BACK</var> is either absent or equals <code>FALSE</code>, this function
 returns the position of the leftmost character of <var>STRING</var> that is
 in <var>SET</var>. If <var>BACK</var> equals <code>TRUE</code>, the rightmost position
 is returned. If no character of <var>SET</var> is found in <var>STRING</var>, the
 result is zero.
 </p>
 </dd>
 <dt><em>Standard</em>:</dt>
 <dd><p>Fortran 95 and later, with <var>KIND</var> argument Fortran 2003 and later
 </p>
 </dd>
 <dt><em>Class</em>:</dt>
 <dd><p>Elemental function
 </p>
 </dd>
 <dt><em>Syntax</em>:</dt>
 <dd><p><code>RESULT = SCAN(STRING, SET[, BACK [, KIND]])</code>
 </p>
 </dd>
 <dt><em>Arguments</em>:</dt>
 <dd><table>
 <tr><td width="15%"><var>STRING</var></td><td width="70%">Shall be of type <code>CHARACTER</code>.</td></tr>
 <tr><td width="15%"><var>SET</var></td><td width="70%">Shall be of type <code>CHARACTER</code>.</td></tr>
 <tr><td width="15%"><var>BACK</var></td><td width="70%">(Optional) shall be of type <code>LOGICAL</code>.</td></tr>
 <tr><td width="15%"><var>KIND</var></td><td width="70%">(Optional) An <code>INTEGER</code> initialization
 expression indicating the kind parameter of the result.</td></tr>
 </table>

 </dd>
 <dt><em>Return value</em>:</dt>
 <dd><p>The return value is of type <code>INTEGER</code> and of kind <var>KIND</var>. If
 <var>KIND</var> is absent, the return value is of default integer kind.
 </p>
 </dd>
 <dt><em>Example</em>:</dt>
 <dd><div class="smallexample">
 <pre class="smallexample">PROGRAM test_scan
   WRITE(*,*) SCAN(&quot;FORTRAN&quot;, &quot;AO&quot;)          ! 2, found 'O'
   WRITE(*,*) SCAN(&quot;FORTRAN&quot;, &quot;AO&quot;, .TRUE.)  ! 6, found 'A'
   WRITE(*,*) SCAN(&quot;FORTRAN&quot;, &quot;C++&quot;)         ! 0, found none
 END PROGRAM
 </pre></div>

 </dd>
 <dt><em>See also</em>:</dt>
 <dd><p><a href="INDEX-intrinsic.html#INDEX-intrinsic">INDEX intrinsic</a>, <a href="VERIFY.html#VERIFY">VERIFY</a>
 </p></dd>
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	<a name="SCAN"></a>
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	<p>
	Next: <a href="SECNDS.html#SECNDS" accesskey="n" rel="next">SECNDS</a>, Previous: <a href="SCALE.html#SCALE" accesskey="p" rel="prev">SCALE</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a>   [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
	</div>
	<hr>
	<a name="SCAN-_002d_002d_002d-Scan-a-string-for-the-presence-of-a-set-of-characters"></a>
	<h3 class="section">8.212 <code>SCAN</code> — Scan a string for the presence of a set of characters</h3>
	<a name="index-SCAN"></a>
	<a name="index-string_002c-find-subset"></a>

	<dl compact="compact">
	<dt><em>Description</em>:</dt>
	<dd><p>Scans a <var>STRING</var> for any of the characters in a <var>SET</var>
	of characters.
	</p>
	<p>If <var>BACK</var> is either absent or equals <code>FALSE</code>, this function
	returns the position of the leftmost character of <var>STRING</var> that is
	in <var>SET</var>. If <var>BACK</var> equals <code>TRUE</code>, the rightmost position
	is returned. If no character of <var>SET</var> is found in <var>STRING</var>, the
	result is zero.
	</p>
	</dd>
	<dt><em>Standard</em>:</dt>
	<dd><p>Fortran 95 and later, with <var>KIND</var> argument Fortran 2003 and later
	</p>
	</dd>
	<dt><em>Class</em>:</dt>
	<dd><p>Elemental function
	</p>
	</dd>
	<dt><em>Syntax</em>:</dt>
	<dd><p><code>RESULT = SCAN(STRING, SET[, BACK [, KIND]])</code>
	</p>
	</dd>
	<dt><em>Arguments</em>:</dt>
	<dd><table>
	<tr><td width="15%"><var>STRING</var></td><td width="70%">Shall be of type <code>CHARACTER</code>.</td></tr>
	<tr><td width="15%"><var>SET</var></td><td width="70%">Shall be of type <code>CHARACTER</code>.</td></tr>
	<tr><td width="15%"><var>BACK</var></td><td width="70%">(Optional) shall be of type <code>LOGICAL</code>.</td></tr>
	<tr><td width="15%"><var>KIND</var></td><td width="70%">(Optional) An <code>INTEGER</code> initialization
	expression indicating the kind parameter of the result.</td></tr>
	</table>

	</dd>
	<dt><em>Return value</em>:</dt>
	<dd><p>The return value is of type <code>INTEGER</code> and of kind <var>KIND</var>. If
	<var>KIND</var> is absent, the return value is of default integer kind.
	</p>
	</dd>
	<dt><em>Example</em>:</dt>
	<dd><div class="smallexample">
	<pre class="smallexample">PROGRAM test_scan
	WRITE(,) SCAN("FORTRAN", "AO") ! 2, found 'O'
	WRITE(,) SCAN("FORTRAN", "AO", .TRUE.) ! 6, found 'A'
	WRITE(,) SCAN("FORTRAN", "C++") ! 0, found none
	END PROGRAM
	</pre></div>

	</dd>
	<dt><em>See also</em>:</dt>
	<dd><p><a href="INDEX-intrinsic.html#INDEX-intrinsic">INDEX intrinsic</a>, <a href="VERIFY.html#VERIFY">VERIFY</a>
	</p></dd>
	</dl>






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