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 </div>
 <hr>
 <a name="VERIFY-_002d_002d_002d-Scan-a-string-for-characters-not-a-given-set"></a>
 <h3 class="section">8.256 <code>VERIFY</code> &mdash; Scan a string for characters not a given set</h3>
 <a name="index-VERIFY"></a>
 <a name="index-string_002c-find-missing-set"></a>

 <dl compact="compact">
 <dt><em>Description</em>:</dt>
 <dd><p>Verifies that all the characters in <var>STRING</var> belong to the set of
 characters in <var>SET</var>.
 </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
 not in <var>SET</var>. If <var>BACK</var> equals <code>TRUE</code>, the rightmost
 position is returned. If all characters of <var>STRING</var> are found in
 <var>SET</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 = VERIFY(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_verify
   WRITE(*,*) VERIFY(&quot;FORTRAN&quot;, &quot;AO&quot;)           ! 1, found 'F'
   WRITE(*,*) VERIFY(&quot;FORTRAN&quot;, &quot;FOO&quot;)          ! 3, found 'R'
   WRITE(*,*) VERIFY(&quot;FORTRAN&quot;, &quot;C++&quot;)          ! 1, found 'F'
   WRITE(*,*) VERIFY(&quot;FORTRAN&quot;, &quot;C++&quot;, .TRUE.)  ! 7, found 'N'
   WRITE(*,*) VERIFY(&quot;FORTRAN&quot;, &quot;FORTRAN&quot;)      ! 0' found none
 END PROGRAM
 </pre></div>

 </dd>
 <dt><em>See also</em>:</dt>
 <dd><p><a href="SCAN.html#SCAN">SCAN</a>, <a href="INDEX-intrinsic.html#INDEX-intrinsic">INDEX intrinsic</a>
 </p></dd>
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	<a name="VERIFY"></a>
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	<p>
	Next: <a href="XOR.html#XOR" accesskey="n" rel="next">XOR</a>, Previous: <a href="UNPACK.html#UNPACK" accesskey="p" rel="prev">UNPACK</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="VERIFY-_002d_002d_002d-Scan-a-string-for-characters-not-a-given-set"></a>
	<h3 class="section">8.256 <code>VERIFY</code> — Scan a string for characters not a given set</h3>
	<a name="index-VERIFY"></a>
	<a name="index-string_002c-find-missing-set"></a>

	<dl compact="compact">
	<dt><em>Description</em>:</dt>
	<dd><p>Verifies that all the characters in <var>STRING</var> belong to the set of
	characters in <var>SET</var>.
	</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
	not in <var>SET</var>. If <var>BACK</var> equals <code>TRUE</code>, the rightmost
	position is returned. If all characters of <var>STRING</var> are found in
	<var>SET</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 = VERIFY(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_verify
	WRITE(,) VERIFY("FORTRAN", "AO") ! 1, found 'F'
	WRITE(,) VERIFY("FORTRAN", "FOO") ! 3, found 'R'
	WRITE(,) VERIFY("FORTRAN", "C++") ! 1, found 'F'
	WRITE(,) VERIFY("FORTRAN", "C++", .TRUE.) ! 7, found 'N'
	WRITE(,) VERIFY("FORTRAN", "FORTRAN") ! 0' found none
	END PROGRAM
	</pre></div>

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






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